{ "schema_version": 2, "slug": "thunderbird", "name": "Mozilla Thunderbird (en-US)", "publisher": "Mozilla", "author": "Mozilla Foundation", "ids": { "winget": "Mozilla.Thunderbird", "moniker": "thunderbird", "homebrew_cask": "thunderbird" }, "platforms": [ "windows", "macos" ], "summary": "Thunderbird is a free email application that is easy to set up and customize - and it's loaded with great features!", "description": "Thunderbird is a free and open source email, newsfeed, chat, and calendaring client, that’s easy to set up and customize. One of the core principles of Thunderbird is the use and promotion of open standards - this focus is a rejection of our world of closed platforms and services that can’t communicate with each other. We want our users to have freedom and choice in how they communicate.", "tags": [ "email", "mail" ], "locale": "en-US", "urls": { "homepage": "https://www.thunderbird.net/", "publisher": "https://www.mozilla.org/", "support": "https://support.mozilla.org/", "privacy": "https://www.mozilla.org/privacy/thunderbird/", "release_notes": "https://www.thunderbird.net/thunderbird/159.0/releasenotes/" }, "license": { "name": "MPL-2.0", "url": "https://www.mozilla.org/MPL/2.0", "spdx": "MPL-2.0", "copyright_url": "https://www.mozilla.org/foundation/trademarks/policy" }, "pricing": { "status": "open-source", "source": "derived-from-license" }, "latest_versions": { "windows": "159.0", "macos": "159.0" }, "last_updated": "2026-10-27", "versions_total": { "windows": 138, "macos": 1 }, "versions": [ { "platform": "windows", "version": "159.0", "release_date": "2026-10-27", "release_notes": "What’s New\nnew\nLinux tray icons indicate unread mail and show its count in the tooltip\nnew\nGraph calendars are auto-detected on new account creation\nWhat’s Fixed\nfixed\nNon-ASCII IMAP tags could exceed server length limits and be rejected\nfixed\nZoom Text Only option did not work in the View menu\nfixed\nMultiple messages were printed even after canceling the print dialog\nfixed\nSave All and Detach All failed for attachments with invalid filename paths\nfixed\nFirst Wrap Long Lines toggle did nothing in View Source\nfixed\nPOP3 NTLM authentication failed because the password was sent incorrectly\nfixed\nSearch Messages menu option was enabled but did not work for saved search folders\nfixed\nQuick Find shortcut (/) only worked after Ctrl+F was used once\nfixed\nUnicode email addresses could hide different Reply-To destinations\nfixed\nNewsgroups with UTF-8 names could display duplicate or incorrect messages\nfixed\nView > Folders did nothing in Calendar and Tasks tabs\nfixed\nGlobal search results did not display recipients in the To field\nfixed\nForwarding malformed MIME messages could omit attachments\nfixed\nRetry and Save Locally failed after a sent-folder copy error\nfixed\nClosing an unmodified compose window prompted to save when using Body Text\nfixed\nMP4 attachments could be truncated when forwarding messages\nfixed\nInline images disappeared when editing local or POP messages as new\nfixed\nEWS/Graph accounts could fail when outgoing server settings were incomplete\nfixed\nAccount Hub Edit Configuration did nothing for Exchange and Graph accounts\nfixed\nFirst message filter condition could not be removed even when others existed\nfixed\nCardDAV address book sync stopped when the server rejected an invalid sync token\nfixed\nCardDAV passwords were not saved, causing repeated login prompts after restart\nfixed\nThunderbird could hang on startup when restoring IMAP message and PDF tabs\nfixed\nMalformed message database files could cause excessive CPU usage\nfixed\nIMAP namespace root folders were inaccessible due to duplicated folder names\nfixed\nExcessive Microsoft Graph requests caused throttling and delayed message display\nfixed\nSMTP addresses with line breaks could inject unintended commands\nfixed\nPOP3 sessions remained active after canceling the password prompt\nfixed\nRemote content could load in news articles with missing message headers\nfixed\nRSS feeds could inject arbitrary Message-ID and References headers\nfixed\nLarge ICS calendar files could exhaust memory and freeze Thunderbird\nfixed\nCalDAV calendars could stop syncing after a network error until restart\nfixed\nAccount Hub failed to discover CalDAV calendars for OAuth2 accounts\nfixed\nYearly recurring events with multiple times per day only appeared at the first time\nfixed\nVisual and UX improvements\nfixed\nSecurity fixes", "release_notes_url": "https://www.thunderbird.net/thunderbird/159.0/releasenotes/", "manifest_version": "1.28.0", "manifest_dir": "manifests/m/Mozilla/Thunderbird/159.0", "installers": [ { "platform": "windows", "architecture": "x86", "type": "nullsoft", "scope": "machine", "url": "https://download-installer.cdn.mozilla.net/pub/thunderbird/releases/159.0/win32/en-US/Thunderbird%20Setup%20159.0.exe", "host": "download-installer.cdn.mozilla.net", "filename": "Thunderbird Setup 159.0.exe", "sha256": "6d96e3d193fb9e1e493954350702e8f5f455ba8786fabbbd21b7a44d595973d9", "product_code": "Mozilla Thunderbird 159.0 (x86 en-US)", "install_modes": [ "interactive", "silent" ], "switches": { "silent": "/S /PreventRebootRequired=true", "silent_with_progress": "/S /PreventRebootRequired=true", "install_location": "/InstallDirectoryPath=\"\"" }, "upgrade_behavior": "install", "protocols": [ "mailto", "mid", "webcal", "webcals" ], "file_extensions": [ "eml", "ics", "wdseml" ] }, { "platform": "windows", "architecture": "x64", "type": "nullsoft", "scope": "machine", "url": "https://download-installer.cdn.mozilla.net/pub/thunderbird/releases/159.0/win64/en-US/Thunderbird%20Setup%20159.0.exe", "host": "download-installer.cdn.mozilla.net", "filename": "Thunderbird Setup 159.0.exe", "sha256": "70eac5e244f67cb4fbe4386da20f5287573233fc5139bcf0e8e522b61e4b013e", "product_code": "Mozilla Thunderbird 159.0 (x64 en-US)", "install_modes": [ "interactive", "silent" ], "switches": { "silent": "/S /PreventRebootRequired=true", "silent_with_progress": "/S /PreventRebootRequired=true", "install_location": "/InstallDirectoryPath=\"\"" }, "upgrade_behavior": "install", "protocols": [ "mailto", "mid", "webcal", "webcals" ], "file_extensions": [ "eml", "ics", "wdseml" ] } ] }, { "platform": "windows", "version": "158.0.1", "release_date": "2026-10-20", "release_notes": "What’s Fixed\nfixed\nDialogs had transparent backgrounds with third party themes\nfixed\nSecurity fixes", "release_notes_url": "https://www.thunderbird.net/thunderbird/158.0.1/releasenotes/", "manifest_version": "1.12.0", "manifest_dir": "manifests/m/Mozilla/Thunderbird/158.0.1", "installers": [ { "platform": "windows", "architecture": "x86", "type": "nullsoft", "scope": "machine", "url": "https://download-installer.cdn.mozilla.net/pub/thunderbird/releases/158.0.1/win32/en-US/Thunderbird%20Setup%20158.0.1.exe", "host": "download-installer.cdn.mozilla.net", "filename": "Thunderbird Setup 158.0.1.exe", "sha256": "f45b5e3ecbf1de13c3f70bfbb6e0c3620b33b97f6baa81144c7d3c2429945470", "product_code": "Mozilla Thunderbird 158.0.1 (x86 en-US)", "install_modes": [ "interactive", "silent" ], "switches": { "silent": "/S /PreventRebootRequired=true", "silent_with_progress": "/S /PreventRebootRequired=true", "install_location": "/InstallDirectoryPath=\"\"" }, "upgrade_behavior": "install", "protocols": [ "mailto", "mid", "webcal", "webcals" ], "file_extensions": [ "eml", "ics", "wdseml" ] }, { "platform": "windows", "architecture": "x64", "type": "nullsoft", "scope": "machine", "url": "https://download-installer.cdn.mozilla.net/pub/thunderbird/releases/158.0.1/win64/en-US/Thunderbird%20Setup%20158.0.1.exe", "host": "download-installer.cdn.mozilla.net", "filename": "Thunderbird Setup 158.0.1.exe", "sha256": "980331d65cb00d965f911e5f7e3e058c22b5f72a98853160a6d000c79fcb5da6", "product_code": "Mozilla Thunderbird 158.0.1 (x64 en-US)", "install_modes": [ "interactive", "silent" ], "switches": { "silent": "/S /PreventRebootRequired=true", "silent_with_progress": "/S /PreventRebootRequired=true", "install_location": "/InstallDirectoryPath=\"\"" }, "upgrade_behavior": "install", "protocols": [ "mailto", "mid", "webcal", "webcals" ], "file_extensions": [ "eml", "ics", "wdseml" ] } ] }, { "platform": "windows", "version": "158.0", "release_date": "2026-10-13", "release_notes": "What’s Changed\nchanged\nQuick filter responsiveness has been improved\nchanged\nExtensionSettings policy installs add-ons from update_url when install_url not set\nWhat’s Fixed\nfixed\nCopy Link Location only copied detached attachment filenames instead of full paths\nfixed\nThunderbird could crash while performing a Body search\nfixed\nTroubleshooting falsely reported crash reports were not configured when available\nfixed\nRight-clicking inline images zoomed them instead of opening the context menu\nfixed\nSwitching to Unified Folders could leave All Folders enabled and not change view\nfixed\nArchived Inbox folders ignored localized names and appeared as \"INBOX\"\nfixed\nOpenPGP key management had unlocking, handle leak, and protection state issues\nfixed\nOpenPGP backup password text could not be copied and context menu was transparent\nfixed\nQuick Filter failed to match accented names when searching without accents\nfixed\nHolding Ctrl+Enter could unintentionally confirm the send prompt and send duplicates\nfixed\nPlain-text inline forwards omitted signatures placed below the quote\nfixed\nRemote content exceptions without a scheme only applied to HTTP, not HTTPS\nfixed\nRemote content exceptions incorrectly allowed wildcard hostnames like *.example.com\nfixed\nSaved CalDAV/CardDAV credentials could be forgotten after restarting Thunderbird\nfixed\nCardDAV setup failed without prompting for a password\nfixed\nCardDAV address book sync failed to fetch newly added contacts\nfixed\nCardDAV updates could corrupt vCard REV timestamps\nfixed\nCardDAV discovery could fail on valid multi-status responses with mixed status codes\nfixed\nSMTP Kerberos authentication failed on Linux with STARTTLS\nfixed\nPOP accounts repeatedly showed connection errors when Thunderbird started offline\nfixed\nMatrix SSO with Save Token disabled reopened the login flow indefinitely\nfixed\nRSS filtering could lose tags and stall processing of later feed items\nfixed\nCalDAV password prompts did not identify the username or calendar\nfixed\nCalendar event edits could fail with localization error in the event dialog\nfixed\nUpdated calendar credentials were not saved from the authentication prompt\nfixed\nVisual and UX improvements\nfixed\nSecurity fixes", "release_notes_url": "https://www.thunderbird.net/thunderbird/158.0/releasenotes/", "manifest_version": "1.12.0", "manifest_dir": "manifests/m/Mozilla/Thunderbird/158.0", "installers": [ { "platform": "windows", "architecture": "x86", "type": "nullsoft", "scope": "machine", "url": "https://download-installer.cdn.mozilla.net/pub/thunderbird/releases/158.0/win32/en-US/Thunderbird%20Setup%20158.0.exe", "host": "download-installer.cdn.mozilla.net", "filename": "Thunderbird Setup 158.0.exe", "sha256": "ea0570aff36734642ca3d6d941b9fc3a596b89af8e6403cb33d0895f433b9160", "product_code": "Mozilla Thunderbird 158.0 (x86 en-US)", "install_modes": [ "interactive", "silent" ], "switches": { "silent": "/S /PreventRebootRequired=true", "silent_with_progress": "/S /PreventRebootRequired=true", "install_location": "/InstallDirectoryPath=\"\"" }, "upgrade_behavior": "install", "protocols": [ "mailto", "mid", "webcal", "webcals" ], "file_extensions": [ "eml", "ics", "wdseml" ] }, { "platform": "windows", "architecture": "x64", "type": "nullsoft", "scope": "machine", "url": "https://download-installer.cdn.mozilla.net/pub/thunderbird/releases/158.0/win64/en-US/Thunderbird%20Setup%20158.0.exe", "host": "download-installer.cdn.mozilla.net", "filename": "Thunderbird Setup 158.0.exe", "sha256": "7337e7bf74b0a0ec708ba457c446be134a0b976ecc17622b962108a322b9270d", "product_code": "Mozilla Thunderbird 158.0 (x64 en-US)", "install_modes": [ "interactive", "silent" ], "switches": { "silent": "/S /PreventRebootRequired=true", "silent_with_progress": "/S /PreventRebootRequired=true", "install_location": "/InstallDirectoryPath=\"\"" }, "upgrade_behavior": "install", "protocols": [ "mailto", "mid", "webcal", "webcals" ], "file_extensions": [ "eml", "ics", "wdseml" ] } ] }, { "platform": "windows", "version": "157.0.1", "release_date": "2026-10-01", "release_notes": "What’s Fixed\nfixed\nEWS/Graph messages could crash Thunderbird when handling relative URL fragments", "release_notes_url": "https://www.thunderbird.net/thunderbird/157.0.1/releasenotes/", "manifest_version": "1.12.0", "manifest_dir": "manifests/m/Mozilla/Thunderbird/157.0.1", "installers": [ { "platform": "windows", "architecture": "x86", "type": "nullsoft", "scope": "machine", "url": "https://download-installer.cdn.mozilla.net/pub/thunderbird/releases/157.0.1/win32/en-US/Thunderbird%20Setup%20157.0.1.exe", "host": "download-installer.cdn.mozilla.net", "filename": "Thunderbird Setup 157.0.1.exe", "sha256": "a725134c30d1bda9c2200734e0e6490a7c88e65738971c3fa2ed8eb0c332e55b", "product_code": "Mozilla Thunderbird 157.0.1 (x86 en-US)", "install_modes": [ "interactive", "silent" ], "switches": { "silent": "/S /PreventRebootRequired=true", "silent_with_progress": "/S /PreventRebootRequired=true", "install_location": "/InstallDirectoryPath=\"\"" }, "upgrade_behavior": "install", "protocols": [ "mailto", "mid", "webcal", "webcals" ], "file_extensions": [ "eml", "ics", "wdseml" ] }, { "platform": "windows", "architecture": "x64", "type": "nullsoft", "scope": "machine", "url": "https://download-installer.cdn.mozilla.net/pub/thunderbird/releases/157.0.1/win64/en-US/Thunderbird%20Setup%20157.0.1.exe", "host": "download-installer.cdn.mozilla.net", "filename": "Thunderbird Setup 157.0.1.exe", "sha256": "dec7acc0e246c9bce3ab23e02fcc55543ea96526bb0a13f5ca8d33a09e904f35", "product_code": "Mozilla Thunderbird 157.0.1 (x64 en-US)", "install_modes": [ "interactive", "silent" ], "switches": { "silent": "/S /PreventRebootRequired=true", "silent_with_progress": "/S /PreventRebootRequired=true", "install_location": "/InstallDirectoryPath=\"\"" }, "upgrade_behavior": "install", "protocols": [ "mailto", "mid", "webcal", "webcals" ], "file_extensions": [ "eml", "ics", "wdseml" ] } ] }, { "platform": "windows", "version": "157.0", "release_date": "2026-09-30", "release_notes": "What’s New\nnew\nEnterprise policy DisableChat disables Thunderbird Chat functionality\nnew\nEnterprise policy DisableFileLink disables Thunderbird FileLink functionality\nWhat’s Changed\nchanged\nPreference mailnews.headers.minNumHeaders has been removed\nchanged\nAllow viewing remote content in OpenPGP messages encrypted with integrity protection\nchanged\nRNP command-line utilities are no longer included with Thunderbird\nchanged\nIMAP/POP manual config port field is now optional\nchanged\nThundermail built-in add-on updated to v2.0.16\nWhat’s Fixed\nfixed\nCtrl+Shift+K could fail to open the Quick Filter UI\nfixed\nMessage list could show the wrong sender for messages\nfixed\nStatus bar could remain active and cause 100% CPU usage after activity ended\nfixed\nOpenPGP discovery failed to find replacement keys after a key was revoked\nfixed\nValid RSA OpenPGP keys could be rejected, preventing encryption\nfixed\nSent messages could silently fail to save to the IMAP Sent folder\nfixed\nSending message did not fail gracefully with malformed references header\nfixed\nThunderbird could hang when waiting for IMAP server greeting during account setup\nfixed\nAccount Hub account creation could fail with malformed URI\nfixed\nCustom OAuth Endpoint Host incorrectly required a full URL instead of a domain\nfixed\nMessage filters could falsely match when evaluating search term failures\nfixed\nCardDAV address books could fail to sync when no password prompt was needed\nfixed\nYahoo emails appeared blank with MIME handlers disabled via mailnews.display.disallow_mime_handlers\nfixed\nPending moves within the same IMAP account could make messages disappear\nfixed\nInline images could disappear after editing and resaving drafts\nfixed\nSMTP OAuth2 failed when large access token exceeded command line length limit\nfixed\nGmail OAuth2 authentication could intermittently fail on Windows\nfixed\nExchange NTLM authentication failed when updated passwords were not saved\nfixed\nSMTP AUTH LOGIN could fail after username challenges and close the connection\nfixed\nAppUpdatePin policy did not prevent Thunderbird from updating beyond pinned version\nfixed\nRecurring events could appear after their configured end date\nfixed\nCalDAV task body could remain outdated after syncing changes from another client\nfixed\nCalDAV invitations could fail when accepted before the calendar synced\nfixed\nVisual and UX improvements\nfixed\nSecurity fixes", "release_notes_url": "https://www.thunderbird.net/thunderbird/157.0/releasenotes/", "manifest_version": "1.12.0", "manifest_dir": "manifests/m/Mozilla/Thunderbird/157.0", "installers": [ { "platform": "windows", "architecture": "x86", "type": "nullsoft", "scope": "machine", "url": "https://download-installer.cdn.mozilla.net/pub/thunderbird/releases/157.0/win32/en-US/Thunderbird%20Setup%20157.0.exe", "host": "download-installer.cdn.mozilla.net", "filename": "Thunderbird Setup 157.0.exe", "sha256": "7a84bd722e49433c782e14f360fce4c1cc4636cb3f9a64aa62877bf363220e30", "product_code": "Mozilla Thunderbird 157.0 (x86 en-US)", "install_modes": [ "interactive", "silent" ], "switches": { "silent": "/S /PreventRebootRequired=true", "silent_with_progress": "/S /PreventRebootRequired=true", "install_location": "/InstallDirectoryPath=\"\"" }, "upgrade_behavior": "install", "protocols": [ "mailto", "mid", "webcal", "webcals" ], "file_extensions": [ "eml", "ics", "wdseml" ] }, { "platform": "windows", "architecture": "x64", "type": "nullsoft", "scope": "machine", "url": "https://download-installer.cdn.mozilla.net/pub/thunderbird/releases/157.0/win64/en-US/Thunderbird%20Setup%20157.0.exe", "host": "download-installer.cdn.mozilla.net", "filename": "Thunderbird Setup 157.0.exe", "sha256": "d8a18e4e4791f08d0e480f1c52616fab2cdc16636c2309e1b3550f551c329f11", "product_code": "Mozilla Thunderbird 157.0 (x64 en-US)", "install_modes": [ "interactive", "silent" ], "switches": { "silent": "/S /PreventRebootRequired=true", "silent_with_progress": "/S /PreventRebootRequired=true", "install_location": "/InstallDirectoryPath=\"\"" }, "upgrade_behavior": "install", "protocols": [ "mailto", "mid", "webcal", "webcals" ], "file_extensions": [ "eml", "ics", "wdseml" ] } ] }, { "platform": "windows", "version": "156.0.1", "release_date": "2026-09-22", "release_notes": "What’s Fixed\nfixed\nThunderbird could crash when saving a message", "release_notes_url": "https://www.thunderbird.net/thunderbird/156.0.1/releasenotes/", "manifest_version": "1.12.0", "manifest_dir": "manifests/m/Mozilla/Thunderbird/156.0.1", "installers": [ { "platform": "windows", "architecture": "x86", "type": "nullsoft", "scope": "machine", "url": "https://download-installer.cdn.mozilla.net/pub/thunderbird/releases/156.0.1/win32/en-US/Thunderbird%20Setup%20156.0.1.exe", "host": "download-installer.cdn.mozilla.net", "filename": "Thunderbird Setup 156.0.1.exe", "sha256": "5543fe82422f734ab43ea3747477d05324318192dba69afd998847d07a15ea77", "product_code": "Mozilla Thunderbird 156.0.1 (x86 en-US)", "install_modes": [ "interactive", "silent" ], "switches": { "silent": "/S /PreventRebootRequired=true", "silent_with_progress": "/S /PreventRebootRequired=true", "install_location": "/InstallDirectoryPath=\"\"" }, "upgrade_behavior": "install", "protocols": [ "mailto", "mid", "webcal", "webcals" ], "file_extensions": [ "eml", "ics", "wdseml" ] }, { "platform": "windows", "architecture": "x64", "type": "nullsoft", "scope": "machine", "url": "https://download-installer.cdn.mozilla.net/pub/thunderbird/releases/156.0.1/win64/en-US/Thunderbird%20Setup%20156.0.1.exe", "host": "download-installer.cdn.mozilla.net", "filename": "Thunderbird Setup 156.0.1.exe", "sha256": "009b001c751cf21dfc89bd5a63b14343ef56ec4fd76ae24566f45b1752a425ac", "product_code": "Mozilla Thunderbird 156.0.1 (x64 en-US)", "install_modes": [ "interactive", "silent" ], "switches": { "silent": "/S /PreventRebootRequired=true", "silent_with_progress": "/S /PreventRebootRequired=true", "install_location": "/InstallDirectoryPath=\"\"" }, "upgrade_behavior": "install", "protocols": [ "mailto", "mid", "webcal", "webcals" ], "file_extensions": [ "eml", "ics", "wdseml" ] } ] }, { "platform": "windows", "version": "156.0", "release_date": "2026-09-15", "release_notes": "What’s New\nnew\nOpenPGP key properties can print debug information to the Error Console\nnew\nExternal browser login flow enabled for Yandex\nnew\nCustom OAuth support for issuer ID and client secret field for IMAP and POP3\nnew\nCustom OAuth support for POP3\nnew\nEnterprise policy DisableUpdateSettings prevents users from changing update settings\nnew\nEnterprise policy DisableDataCollectionSettings prevents users from changing data collection setting\nnew\nEnterprise policy DisableMessageForwardingFilters prevents message filters from automatically forwarding messages\nWhat’s Changed\nchanged\nPreference mail.offer_experimental_features renamed to mail.experimental_features_settings.enabled\nchanged\nThundermail built-in add-on updated to v2.0.11\nWhat’s Fixed\nfixed\nDetached attachment links were truncated when folder path contained &\nfixed\nOpening a PDF attachment in a tab displayed empty tab\nfixed\nPOP3 folders with names over 55 characters could become duplicated after upgrading\nfixed\nFolders with invalid filename characters could show hashed names if cache was lost\nfixed\nSave All, Detach All, and Delete All failed after deleting one attachment\nfixed\nRenaming folders could reset folder settings\nfixed\nSubscribing an IMAP folder and subfolder together failed to subscribe the subfolder\nfixed\nSome newly fetched POP messages were not marked with new star after startup\nfixed\nSorting after deleting the only child message removed the parent from view\nfixed\nOpenPGP signing failed with external GnuPG when the primary key could not sign\nfixed\nRemote content could load in encrypted messages opened from files\nfixed\nSent message with expired S/MIME certificate wrongly showed untrusted CA warning\nfixed\nPDF attachments from compose windows could wrongly be detected as HTML\nfixed\nSaving unconfirmed recipients could create invalid address pills with >>\nfixed\nExternal browser OAuth failed when a browser preconnection closed first\nfixed\nUsers could not set up custom OAuth for Exchange accounts\nfixed\nPressing Enter on Windows system tray icon did not restore Thunderbird window\nfixed\nInline attachments incorrectly changed the message channel content type\nfixed\nMessage loading was slow while discovering large numbers of IMAP folders\nfixed\nSMTP authentication failed when usernames contained non-ASCII characters\nfixed\nUnsupported EWS archive folder prevented all mailbox folders from syncing\nfixed\nManual Get Messages failed after startup until toggling offline mode\nfixed\nCase differences in CalDAV email addresses caused duplicate invitations\nfixed\nAccepted CalDAV invitations could be saved to the wrong calendar\nfixed\nVisual and UX improvements\nfixed\nSecurity fixes", "release_notes_url": "https://www.thunderbird.net/thunderbird/156.0/releasenotes/", "manifest_version": "1.12.0", "manifest_dir": "manifests/m/Mozilla/Thunderbird/156.0", "installers": [ { "platform": "windows", "architecture": "x86", "type": "nullsoft", "scope": "machine", "url": "https://download-installer.cdn.mozilla.net/pub/thunderbird/releases/156.0/win32/en-US/Thunderbird%20Setup%20156.0.exe", "host": "download-installer.cdn.mozilla.net", "filename": "Thunderbird Setup 156.0.exe", "sha256": "cf4678658dc01e2ca4890c27a2f2d565a9db39a7260e30136bf52d04624860b4", "product_code": "Mozilla Thunderbird 156.0 (x86 en-US)", "install_modes": [ "interactive", "silent" ], "switches": { "silent": "/S /PreventRebootRequired=true", "silent_with_progress": "/S /PreventRebootRequired=true", "install_location": "/InstallDirectoryPath=\"\"" }, "upgrade_behavior": "install", "protocols": [ "mailto", "mid", "webcal", "webcals" ], "file_extensions": [ "eml", "ics", "wdseml" ] }, { "platform": "windows", "architecture": "x64", "type": "nullsoft", "scope": "machine", "url": "https://download-installer.cdn.mozilla.net/pub/thunderbird/releases/156.0/win64/en-US/Thunderbird%20Setup%20156.0.exe", "host": "download-installer.cdn.mozilla.net", "filename": "Thunderbird Setup 156.0.exe", "sha256": "f42d15e4a9a1ef40522aeca46dfc0adc236dc2620c8653b6b39ef81687cf0fdd", "product_code": "Mozilla Thunderbird 156.0 (x64 en-US)", "install_modes": [ "interactive", "silent" ], "switches": { "silent": "/S /PreventRebootRequired=true", "silent_with_progress": "/S /PreventRebootRequired=true", "install_location": "/InstallDirectoryPath=\"\"" }, "upgrade_behavior": "install", "protocols": [ "mailto", "mid", "webcal", "webcals" ], "file_extensions": [ "eml", "ics", "wdseml" ] } ] }, { "platform": "windows", "version": "155.0.1", "release_date": "2026-09-09", "release_notes": "What’s Fixed\nfixed\nEmpty filter search values matched every message", "release_notes_url": "https://www.thunderbird.net/thunderbird/155.0.1/releasenotes/", "manifest_version": "1.12.0", "manifest_dir": "manifests/m/Mozilla/Thunderbird/155.0.1", "installers": [ { "platform": "windows", "architecture": "x86", "type": "nullsoft", "scope": "machine", "url": "https://download-installer.cdn.mozilla.net/pub/thunderbird/releases/155.0.1/win32/en-US/Thunderbird%20Setup%20155.0.1.exe", "host": "download-installer.cdn.mozilla.net", "filename": "Thunderbird Setup 155.0.1.exe", "sha256": "6934ffdd681f5198bf2ef9a6a86c08a7826fcce07ffe1325ab9f879542960316", "product_code": "Mozilla Thunderbird 155.0.1 (x86 en-US)", "install_modes": [ "interactive", "silent" ], "switches": { "silent": "/S /PreventRebootRequired=true", "silent_with_progress": "/S /PreventRebootRequired=true", "install_location": "/InstallDirectoryPath=\"\"" }, "upgrade_behavior": "install", "protocols": [ "mailto", "mid", "webcal", "webcals" ], "file_extensions": [ "eml", "ics", "wdseml" ] }, { "platform": "windows", "architecture": "x64", "type": "nullsoft", "scope": "machine", "url": "https://download-installer.cdn.mozilla.net/pub/thunderbird/releases/155.0.1/win64/en-US/Thunderbird%20Setup%20155.0.1.exe", "host": "download-installer.cdn.mozilla.net", "filename": "Thunderbird Setup 155.0.1.exe", "sha256": "5804aa8c952ca263a6718d0c05509cb27283490456f724d8bbb62fdeb0f6d11d", "product_code": "Mozilla Thunderbird 155.0.1 (x64 en-US)", "install_modes": [ "interactive", "silent" ], "switches": { "silent": "/S /PreventRebootRequired=true", "silent_with_progress": "/S /PreventRebootRequired=true", "install_location": "/InstallDirectoryPath=\"\"" }, "upgrade_behavior": "install", "protocols": [ "mailto", "mid", "webcal", "webcals" ], "file_extensions": [ "eml", "ics", "wdseml" ] } ] }, { "platform": "windows", "version": "155.0", "release_date": "2026-09-01", "release_notes": "What’s New\nnew\nS/MIME popup shows signature, digest, encryption algorithms and key sizes\nnew\nDefault address book for manually added contacts configurable with mail.addr_book.add_item_default_uri\nnew\nEnterprise policy DisableQRExport can disable QR export\nnew\nOAuth add-ons can override built-in settings for selected domains and hostnames\nnew\nManual account config streamlined with Exchange, Graph, and custom OAuth support\nnew\nCustom OAuth support for IMAP and SMTP servers\nnew\nPKCE and external browser fields added to custom OAuth settings\nnew\nEnterprise policy DisableExperimentalFeatures for disabling experimental features\nWhat’s Fixed\nfixed\nUnread count dock badge disappeared on macOS restart when no mail window opened\nfixed\nIMAP tags did not sync automatically across clients\nfixed\nEmbedded SVG images appeared broken when Display Attachments Inline was disabled\nfixed\nHolding arrow keys failed to smoothly navigate the folder pane\nfixed\nMark and Tag menu bar items were disabled in search results\nfixed\nQuick Filter ignored address book display names shown in message lists and headers\nfixed\nAttachment filters could disappear or return no results in global search\nfixed\nBody search failed for quoted-printable messages ending on a soft line break\nfixed\nFailed encrypted send did not preserve draft\nfixed\nFailed account setup left an incoming server that blocked account recreation\nfixed\nRemoving an account did not remove its OAuth token from the password manager\nfixed\nAccount Hub prompted for calendar credentials immediately after successful login\nfixed\nFilters could copy empty messages to Local Folders during startup mail download\nfixed\nClosing message filters wrongly warned completed newsgroup filters were running\nfixed\nAutoscroll icon was missing directional arrows in scrollable messages\nfixed\nApple Mail text attachments may not appear in MIME messages\nfixed\nForwarded messages could display incorrect encoding\nfixed\nThunderbird could crash due to improper database memory handling\nfixed\nThunderbird could crash on shutdown while waiting for OAuth2 password entry\nfixed\nThunderbird could crash while loading mail folders\nfixed\nCustom OAuth could not be disabled\nfixed\nLegacy IMAP tag changes were not sent to the server and reverted after refresh\nfixed\nDeleting an Exchange account retained the outgoing server settings\nfixed\nCalDAV calendars with offline support could stop fully synchronizing events\nfixed\nOffline cached ICS calendar changes were silently lost after reconnecting\nfixed\nThunderbird upgrade disabled composition toolbar\nfixed\nThunderbird upgrade disabled Settings menu for versions before macOS 13\nfixed\nWindows jump list menu no longer functioned correctly\nfixed\nVisual and UX improvements\nfixed\nSecurity fixes", "release_notes_url": "https://www.thunderbird.net/thunderbird/155.0/releasenotes/", "manifest_version": "1.12.0", "manifest_dir": "manifests/m/Mozilla/Thunderbird/155.0", "installers": [ { "platform": "windows", "architecture": "x86", "type": "nullsoft", "scope": "machine", "url": "https://download-installer.cdn.mozilla.net/pub/thunderbird/releases/155.0/win32/en-US/Thunderbird%20Setup%20155.0.exe", "host": "download-installer.cdn.mozilla.net", "filename": "Thunderbird Setup 155.0.exe", "sha256": "794c79b4f1c67b468668b13bdb53d3e855e21ce57c46aff451ed5b4fb9760a26", "product_code": "Mozilla Thunderbird 155.0 (x86 en-US)", "install_modes": [ "interactive", "silent" ], "switches": { "silent": "/S /PreventRebootRequired=true", "silent_with_progress": "/S /PreventRebootRequired=true", "install_location": "/InstallDirectoryPath=\"\"" }, "upgrade_behavior": "install", "protocols": [ "mailto", "mid", "webcal", "webcals" ], "file_extensions": [ "eml", "ics", "wdseml" ] }, { "platform": "windows", "architecture": "x64", "type": "nullsoft", "scope": "machine", "url": "https://download-installer.cdn.mozilla.net/pub/thunderbird/releases/155.0/win64/en-US/Thunderbird%20Setup%20155.0.exe", "host": "download-installer.cdn.mozilla.net", "filename": "Thunderbird Setup 155.0.exe", "sha256": "8a42316b94de77faddbcb53d02612dbc6687369be8f629b1752882d4bc2aac33", "product_code": "Mozilla Thunderbird 155.0 (x64 en-US)", "install_modes": [ "interactive", "silent" ], "switches": { "silent": "/S /PreventRebootRequired=true", "silent_with_progress": "/S /PreventRebootRequired=true", "install_location": "/InstallDirectoryPath=\"\"" }, "upgrade_behavior": "install", "protocols": [ "mailto", "mid", "webcal", "webcals" ], "file_extensions": [ "eml", "ics", "wdseml" ] } ] }, { "platform": "windows", "version": "154.0", "release_date": "2026-08-18", "release_notes": "What’s New\nnew\nPreview functionality for attachments on macOS\nnew\nCMS message with AuthEnvelopedData can be decrypted properly in Thunderbird\nnew\nGlobal search results can open in list view by default with new setting\nnew\n\"Copy To\" folder context menu added for message/rfc822 attachments\nnew\nOptional system tray mode that hides Thunderbird when the last window closes\nnew\nSupport for dragging message/rfc822 type MIME attachments to folder tree\nnew\nMicrosoft Graph enabled for Microsoft 365\nWhat’s Fixed\nfixed\nRemote content warnings appeared despite sender block exceptions being applied\nfixed\nCollapsed saved-search folders did not deselect their subfolders\nfixed\nServer-designated special folder flags could be removed until restart\nfixed\nMessages could render excessive trailing blank lines\nfixed\nCopying a message subject included the \"Subject:\" label in copied text\nfixed\nMoving IMAP folders to Local Folders could delete messages after copy failures\nfixed\n7-bit clean unobtrusive signature payloads were unnecessarily base64 encoded\nfixed\nDisablePasswordReveal policy failed to prevent revealing saved passwords\nfixed\nAccount setup tried local-part usernames before full email addresses\nfixed\nRead-only CardDAV address books were incorrectly treated as writable\nfixed\nAutoscroll icon was missing directional arrows in scrollable messages\nfixed\nBlank 1970-dated messages could appear from incomplete message file copies\nfixed\nOpening drafts or templates with invalid quoted-printable data could crash Thunderbird\nfixed\nThunderbird could crash when inserting a message header into database cache\nfixed\nIMAP repeatedly notified for messages already read on another device\nfixed\nDragging EWS search folders to Trash caused Thunderbird to crash\nfixed\nFolder compaction displayed incorrect disk space recovery estimates\nfixed\nCustom OAuth settings for EWS account overwrote original account's settings\nfixed\nThunderbird could crash when going offline with an active IMAP IDLE connection\nfixed\nThunderbird could crash while running online mail search\nfixed\nExchange accounts could show repeated false login failures during authentication\nfixed\nExpired newsgroup articles showed an insecure \"click here\" purge link\nfixed\nIMAP attachments appeared empty after messages were moved by filters\nfixed\nDefault special-folder names could reference nonexistent server folders\nfixed\nThunderbird macOS fell back to Software WebRender after GPU process launch failures\nfixed\nNew RSS subscriptions used updated dates instead of published dates\nfixed\nCalendar sort order was not preserved across Thunderbird restarts\nfixed\n\"All calendars are disabled\" banner reappeared after enabling a calendar\nfixed\nDismissed CalDAV reminders could permanently stop future event notifications\nfixed\nRead-only CardDAV calendars were incorrectly treated as writable\nfixed\nCalDAV sync failed when server responses used UTF-16 encoding\nfixed\nVisual and UX improvements\nfixed\nSecurity fixes", "release_notes_url": "https://www.thunderbird.net/thunderbird/154.0/releasenotes/", "manifest_version": "1.12.0", "manifest_dir": "manifests/m/Mozilla/Thunderbird/154.0", "installers": [ { "platform": "windows", "architecture": "x86", "type": "nullsoft", "scope": "machine", "url": "https://download-installer.cdn.mozilla.net/pub/thunderbird/releases/154.0/win32/en-US/Thunderbird%20Setup%20154.0.exe", "host": "download-installer.cdn.mozilla.net", "filename": "Thunderbird Setup 154.0.exe", "sha256": "64d6aa21cb1de8250b755c38c064cb61f4be0e22840c087d511e39cb19638818", "product_code": "Mozilla Thunderbird 154.0 (x86 en-US)", "install_modes": [ "interactive", "silent" ], "switches": { "silent": "/S /PreventRebootRequired=true", "silent_with_progress": "/S /PreventRebootRequired=true", "install_location": "/InstallDirectoryPath=\"\"" }, "upgrade_behavior": "install", "protocols": [ "mailto", "mid", "webcal", "webcals" ], "file_extensions": [ "eml", "ics", "wdseml" ] }, { "platform": "windows", "architecture": "x64", "type": "nullsoft", "scope": "machine", "url": "https://download-installer.cdn.mozilla.net/pub/thunderbird/releases/154.0/win64/en-US/Thunderbird%20Setup%20154.0.exe", "host": "download-installer.cdn.mozilla.net", "filename": "Thunderbird Setup 154.0.exe", "sha256": "18ee5928cf6a8b35a582bf4758d03cc3aaf3f33ed3615f54ca15e4029a1371a7", "product_code": "Mozilla Thunderbird 154.0 (x64 en-US)", "install_modes": [ "interactive", "silent" ], "switches": { "silent": "/S /PreventRebootRequired=true", "silent_with_progress": "/S /PreventRebootRequired=true", "install_location": "/InstallDirectoryPath=\"\"" }, "upgrade_behavior": "install", "protocols": [ "mailto", "mid", "webcal", "webcals" ], "file_extensions": [ "eml", "ics", "wdseml" ] } ] }, { "platform": "windows", "version": "153.0.3", "release_date": "2026-08-11", "release_notes": "What’s Fixed\nfixed\nThunderbird could crash when saving a sent Exchange message", "release_notes_url": "https://www.thunderbird.net/thunderbird/153.0.3/releasenotes/", "manifest_version": "1.12.0", "manifest_dir": "manifests/m/Mozilla/Thunderbird/153.0.3", "installers": [ { "platform": "windows", "architecture": "x86", "type": "nullsoft", "scope": "machine", "url": "https://download-installer.cdn.mozilla.net/pub/thunderbird/releases/153.0.3/win32/en-US/Thunderbird%20Setup%20153.0.3.exe", "host": "download-installer.cdn.mozilla.net", "filename": "Thunderbird Setup 153.0.3.exe", "sha256": "694c3f37c6102e17ab76102c662410aa2161d9a12eb5b354efc557f835500563", "product_code": "Mozilla Thunderbird 153.0.3 (x86 en-US)", "install_modes": [ "interactive", "silent" ], "switches": { "silent": "/S /PreventRebootRequired=true", "silent_with_progress": "/S /PreventRebootRequired=true", "install_location": "/InstallDirectoryPath=\"\"" }, "upgrade_behavior": "install", "protocols": [ "mailto", "mid", "webcal", "webcals" ], "file_extensions": [ "eml", "ics", "wdseml" ] }, { "platform": "windows", "architecture": "x64", "type": "nullsoft", "scope": "machine", "url": "https://download-installer.cdn.mozilla.net/pub/thunderbird/releases/153.0.3/win64/en-US/Thunderbird%20Setup%20153.0.3.exe", "host": "download-installer.cdn.mozilla.net", "filename": "Thunderbird Setup 153.0.3.exe", "sha256": "f8078deceb1f80b05d75eec92399ce01ab3027fe719fbe2aed612001bea24ad3", "product_code": "Mozilla Thunderbird 153.0.3 (x64 en-US)", "install_modes": [ "interactive", "silent" ], "switches": { "silent": "/S /PreventRebootRequired=true", "silent_with_progress": "/S /PreventRebootRequired=true", "install_location": "/InstallDirectoryPath=\"\"" }, "upgrade_behavior": "install", "protocols": [ "mailto", "mid", "webcal", "webcals" ], "file_extensions": [ "eml", "ics", "wdseml" ] } ] }, { "platform": "windows", "version": "153.0.2", "release_date": "2026-08-04", "release_notes": "What’s Changed\nchanged\nThere are no Thunderbird changes requiring release notes in this release", "release_notes_url": "https://www.thunderbird.net/thunderbird/153.0.2/releasenotes/", "manifest_version": "1.12.0", "manifest_dir": "manifests/m/Mozilla/Thunderbird/153.0.2", "installers": [ { "platform": "windows", "architecture": "x86", "type": "nullsoft", "scope": "machine", "url": "https://download-installer.cdn.mozilla.net/pub/thunderbird/releases/153.0.2/win32/en-US/Thunderbird%20Setup%20153.0.2.exe", "host": "download-installer.cdn.mozilla.net", "filename": "Thunderbird Setup 153.0.2.exe", "sha256": "5d315ac21e9143505b1196e985a54b73e0058642c7d5f9c7c020bed5192fba5f", "product_code": "Mozilla Thunderbird 153.0.2 (x86 en-US)", "install_modes": [ "interactive", "silent" ], "switches": { "silent": "/S /PreventRebootRequired=true", "silent_with_progress": "/S /PreventRebootRequired=true", "install_location": "/InstallDirectoryPath=\"\"" }, "upgrade_behavior": "install", "protocols": [ "mailto", "mid", "webcal", "webcals" ], "file_extensions": [ "eml", "ics", "wdseml" ] }, { "platform": "windows", "architecture": "x64", "type": "nullsoft", "scope": "machine", "url": "https://download-installer.cdn.mozilla.net/pub/thunderbird/releases/153.0.2/win64/en-US/Thunderbird%20Setup%20153.0.2.exe", "host": "download-installer.cdn.mozilla.net", "filename": "Thunderbird Setup 153.0.2.exe", "sha256": "aaa4fbe7e605594c5d75d5c97392e7226c77ecc1683abfb7f26b81d1a1d5da1e", "product_code": "Mozilla Thunderbird 153.0.2 (x64 en-US)", "install_modes": [ "interactive", "silent" ], "switches": { "silent": "/S /PreventRebootRequired=true", "silent_with_progress": "/S /PreventRebootRequired=true", "install_location": "/InstallDirectoryPath=\"\"" }, "upgrade_behavior": "install", "protocols": [ "mailto", "mid", "webcal", "webcals" ], "file_extensions": [ "eml", "ics", "wdseml" ] } ] }, { "platform": "windows", "version": "153.0.1", "release_date": "2026-07-28", "release_notes": "What’s Fixed\nfixed\nNew Message and New Event buttons were unreadable in right-to-left locales\nfixed\nOpenPGP sending failed when an accepted key lacked a valid encryption subkey", "release_notes_url": "https://www.thunderbird.net/thunderbird/153.0.1/releasenotes/", "manifest_version": "1.12.0", "manifest_dir": "manifests/m/Mozilla/Thunderbird/153.0.1", "installers": [ { "platform": "windows", "architecture": "x86", "type": "nullsoft", "scope": "machine", "url": "https://download-installer.cdn.mozilla.net/pub/thunderbird/releases/153.0.1/win32/en-US/Thunderbird%20Setup%20153.0.1.exe", "host": "download-installer.cdn.mozilla.net", "filename": "Thunderbird Setup 153.0.1.exe", "sha256": "e22343c89a38fe686228c3e1c823854269e7ced864475abe9f88d1884fe1f707", "product_code": "Mozilla Thunderbird 153.0.1 (x86 en-US)", "install_modes": [ "interactive", "silent" ], "switches": { "silent": "/S /PreventRebootRequired=true", "silent_with_progress": "/S /PreventRebootRequired=true", "install_location": "/InstallDirectoryPath=\"\"" }, "upgrade_behavior": "install", "protocols": [ "mailto", "mid", "webcal", "webcals" ], "file_extensions": [ "eml", "ics", "wdseml" ] }, { "platform": "windows", "architecture": "x64", "type": "nullsoft", "scope": "machine", "url": "https://download-installer.cdn.mozilla.net/pub/thunderbird/releases/153.0.1/win64/en-US/Thunderbird%20Setup%20153.0.1.exe", "host": "download-installer.cdn.mozilla.net", "filename": "Thunderbird Setup 153.0.1.exe", "sha256": "744a51965ae6fe36a7ec660d8c080fd108cca732e9aec3f9a31324321c6be1ca", "product_code": "Mozilla Thunderbird 153.0.1 (x64 en-US)", "install_modes": [ "interactive", "silent" ], "switches": { "silent": "/S /PreventRebootRequired=true", "silent_with_progress": "/S /PreventRebootRequired=true", "install_location": "/InstallDirectoryPath=\"\"" }, "upgrade_behavior": "install", "protocols": [ "mailto", "mid", "webcal", "webcals" ], "file_extensions": [ "eml", "ics", "wdseml" ] } ] }, { "platform": "windows", "version": "153.0", "release_date": "2026-07-21", "release_notes": "What’s New\nnew\nUnified folders now display account color indicator with account name tooltip\nnew\nOAuth login for mail accounts now opens in default web browser\nnew\nThundermail services can now be used without installing an add-on\nnew\nOAuth responses now verify issuer fields and reject missing required issuers\nWhat’s Changed\nchanged\nRemoved Odnoklassniki chat setup and directed users to XMPP configuration\nWhat’s Fixed\nfixed\nCtrl+S did not save PDF attachments opened in Thunderbird tabs\nfixed\nTLS errors incorrectly reported all unknown failures as untrusted certificates\nfixed\nThunderbird could crash during shutdown\nfixed\nThunderbird could crash when copying an empty list of messages\nfixed\nNew mail alerts incorrectly sized or positioned on some multi-monitor setups\nfixed\nOld IMAP profile migration deleted INBOX and other mailbox files\nfixed\nSpace bar did not scroll in PDF attachments opened from emails\nfixed\n'Search Messages' shortcut (Ctrl+Shift+F) failed in standalone message window\nfixed\nFolder location widget used non-localised name\nfixed\nEmpty confirmation dialog when more messages opened in tabs than mailnews.open_tab_warning\nfixed\nRemoving tags from IMAP messages could fail and tags reappeared after refresh\nfixed\nFolder pane could not be horizontally resized in additional 3-pane tabs\nfixed\nGlobal search failed to display inaccessible messages found in local folders\nfixed\nNumeric subfolders were sorted alphabetically instead of naturally\nfixed\nVirtual folder folder-picker showed unlabeled IM account as selectable folder\nfixed\nVirtual folders failed to preserve the online search setting\nfixed\nApple Mail OpenPGP emails failed to decrypt due to hidden recipient key ID\nfixed\nOpenPGP import of public key with experimental packets failed with unclear error\nfixed\nPerformance issue when decrypting encrypted messages\nfixed\nOpening messages with OpenPGP keys was slow and blocked the UI for large keyrings\nfixed\nOpenPGP key refresh failed when fingerprint lookup returned multiple results\nfixed\nInvalid S/MIME encryption certificate caused misleading send errors\nfixed\nEsc cleared quick filter pin after changing folder\nfixed\nDragging email address between compose windows failed to add recipients\nfixed\nThunderbird could crash when using Find and Replace All\nfixed\nSending Message dialog got stuck on \"Filter complete.\" after successful send\nfixed\nCompose with PDF attachments opened PDFs instead of creating a new email\nfixed\nAttachments opened via -compose on Windows could use incorrect filenames\nfixed\nCtrl+Enter opened attachment instead of sending the message\nfixed\nCompose window remained open when delayed sending was enabled\nfixed\nAccount hub showed connection security instead of actual authentication method\nfixed\nAccount Hub GSSAPI autoconfiguration incorrectly prompted for a password\nfixed\nNew identity dialog lacked reply-matching and end-to-end encryption settings\nfixed\nAccount Hub manual EWS setup lacked OAuth authentication option\nfixed\nThunderbird could fail to shut down cleanly during active OAuth requests\nfixed\nAccount Hub kept OAuth selected after changing to hostname without OAuth support\nfixed\nAccount Hub showed a false error when returning from EWS manual configuration\nfixed\nAccount Hub autodetect wrongly prompted for a password when auth was unavailable\nfixed\nQR exports with SMTP passwords generated invalid data for Thunderbird for Android\nfixed\nMessage Filters 'Run Now' button remained disabled after filter run or mail check\nfixed\nRedirected CardDAV URLs resolved relative URLs against the wrong host\nfixed\nThunderbird could crash when completing folder copy/move\nfixed\nForwarding some Apple Mail messages incorrectly attached inline text as a file\nfixed\nAuto-compaction could corrupt database and cause crashes during syncs\nfixed\nNNTP server with invalid TLS certificate could not be added to certificate exceptions\nfixed\nSent message in EWS account showed message as unread in the sent items folder\nfixed\nEWS NTLM authentication triggered login failures despite successful syncs\nfixed\nSaving inline Exchange images used incorrect filenames and file types\nfixed\nCancelled message send could not be retried and hung with SMTP timeout errors\nfixed\nEWS folders failed to show new mail notifications until the folder was selected\nfixed\nCorrupted NNTP account data caused excessive memory use and startup crash\nfixed\nMultiple selected IMAP folders could not be moved or deleted together\nfixed\nNon-Latin IMAP keywords were lowercased and encoded incorrectly as MUTF-7\nfixed\nMessage tags were lost when moving folder from local folder to IMAP folder\nfixed\nReply All button was missing for some EWS messages with multiple recipients\nfixed\nEWS users could not permanently delete individual Trash messages\nfixed\nRemoving a chat account threw an exception and failed to clear the UI\nfixed\nPrimary Password policy was detected but not enforced for saved account passwords\nfixed\nCopying one recurring event occurrence failed to set the date when pasted\nfixed\nCalendar invites were incorrectly marked processed after calendar sync completed\nfixed\nICS event comments were not displayed in Thunderbird event details\nfixed\nVisual and UX improvements\nfixed\nSecurity fixes", "release_notes_url": "https://www.thunderbird.net/thunderbird/153.0/releasenotes/", "manifest_version": "1.12.0", "manifest_dir": "manifests/m/Mozilla/Thunderbird/153.0", "installers": [ { "platform": "windows", "architecture": "x86", "type": "nullsoft", "scope": "machine", "url": "https://download-installer.cdn.mozilla.net/pub/thunderbird/releases/153.0/win32/en-US/Thunderbird%20Setup%20153.0.exe", "host": "download-installer.cdn.mozilla.net", "filename": "Thunderbird Setup 153.0.exe", "sha256": "c08d1f946b19e89c5776b33a6680663a114fe5a878e1bf67fbd53abc60e2098d", "product_code": "Mozilla Thunderbird 153.0 (x86 en-US)", "install_modes": [ "interactive", "silent" ], "switches": { "silent": "/S /PreventRebootRequired=true", "silent_with_progress": "/S /PreventRebootRequired=true", "install_location": "/InstallDirectoryPath=\"\"" }, "upgrade_behavior": "install", "protocols": [ "mailto", "mid", "webcal", "webcals" ], 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policies\nnew\nOne-click account setup for Thundermail accounts\nWhat’s Changed\nchanged\nUse 'Add' instead of 'New' for account, calendar, address book creation buttons\nchanged\nGMail OAuth updated to use PKCE\nchanged\nHostname of mail server is also checked when detecting address books and calendars\nchanged\nUpdated about:rights to replace local with hosted url\nchanged\n'Hide completed tasks' now also hides cancelled tasks\nWhat’s Fixed\nfixed\nNew mail alerts appeared on wrong monitor in three-monitor setup\nfixed\nSpam messages triggered new mail notifications before being moved to Spam folder\nfixed\nFiltered IMAP or NNTP subscriptions were lost after closing Subscribe dialog\nfixed\n'Download Headers' dialog for newsgroups failed to open\nfixed\nMessages nested deeper than 255 levels disappeared from threading view\nfixed\nPerforming Delete followed by Undo on thread parent message could corrupt view\nfixed\nSingle messages still appeared collapsible after thread members were deleted\nfixed\nUpdated threads remained misordered until folder refresh or resort\nfixed\nNon-threaded subject sorting separated 'RE:' replies from original messages\nfixed\nBCC recipients were included in signed email headers\nfixed\nPerformance issue when decrypting encrypted messages\nfixed\nFilter search on Body missed draft messages containing German umlauts\nfixed\nThunderbird could crash during local message search\nfixed\nBlocked file warning showed without 'Unblock File' button in compose window\nfixed\nForwarding/Redirecting Exchange messages failed with NS_ERROR_OUT_OF_MEMORY\nfixed\nCompose window closed early and send progress dialog hung after NNTP failure\nfixed\nCompose window stayed open after sending when mailnews.sendInBackground set\nfixed\nMicrosoft OAuth2 failed when HTTPS localhost redirect was not intercepted\nfixed\nPasting contact photos stopped working when photo button had focus\nfixed\nFilter dialog lacked focus ring and had poorly distinguishable buttons\nfixed\nSubfolder kept stale accessibility unread count after unread messages were deleted\nfixed\n'Edit as New Message' and inline 'Forward' not possible with PGP-signed messages\nfixed\nVarious MIME improvements\nfixed\nEWS messages could go missing from folder view\nfixed\nIMAP \"Show only subscribed folders\" could not be changed without restart\nfixed\nUnable to delete more than 1000 messages at a time on Microsoft 365\nfixed\nEWS folders in Trash were moved to Trash again instead of being hard deleted\nfixed\nIMAP notifications repeated for emails read on another device after sleep wake\nfixed\nPOP3 deadlocked when server went silent without closing socket\nfixed\nCalendar acceptance no longer distinguished between single occurrence and series\nfixed\nTransparent popups on macOS made calendar event editing difficult\nfixed\nDuplicate attendees were added to invitations instead of being filtered out\nfixed\nTask percentage complete was not preserved separately from status 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auto-configuration\nnew\nEnable users to override OAuth provider details for EWS accounts\nnew\nTasks can be sorted by created or modified date\nWhat’s Changed\nchanged\nReinstated default application check when Thunderbird starts\nchanged\nOpenPGP public key no longer attached by default in signed-only messages\nWhat’s Fixed\nfixed\nThunderbird could crash when processing message headers\nfixed\nThunderbird could crash on startup\nfixed\nCalendar view tabs were not properly keyboard accessible\nfixed\nThunderbird could crash when processing new incoming messages\nfixed\nOn macOS, dragging attachments out of Thunderbird created multiple copies\nfixed\nCancelling a newsgroup posting was not possible\nfixed\nSome IMAP emails showed current time instead of correct received date\nfixed\nSearch result count was missing when using 'Find in Message' or Ctrl+F\nfixed\nSearch results showed older irrelevant emails before newer exact matches\nfixed\nReply with selected text lost formatting for HTML messages containing \nfixed\nMultipart/related attachments were not preserved when editing or forwarding\nfixed\nForwarded malformed MIME email had empty body and extra attachment\nfixed\nOWL add-on description was not visible in Account Hub for non-en-US locales\nfixed\nAccount Hub prompted for password after OAuth login, causing Outlook setup failure\nfixed\nAuto-discovered Account Hub values were not preserved for manual editing\nfixed\nAccount Hub links for encryption and signature opened the wrong account\nfixed\nVirtual folders did not update correctly for filtered POP3 messages\nfixed\nThunderbird could crash in spam filtering\nfixed\nUsing thunderbird -compose with double quotes made last email address invalid\nfixed\nWith auto-mark-read disabled, large mail still marked as read during load delay\nfixed\nIt was not possible to create date-only all-day tasks\nfixed\nTask context menu (right-click) had several disabled menu items\nfixed\n'Current Tasks' view showed past and 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"platform": "windows", "architecture": "x64", "type": "nullsoft", "scope": "machine", "url": "https://download-installer.cdn.mozilla.net/pub/thunderbird/releases/150.0.2/win64/en-US/Thunderbird%20Setup%20150.0.2.exe", "host": "download-installer.cdn.mozilla.net", "filename": "Thunderbird Setup 150.0.2.exe", "sha256": "d2780ade9361ac1a5358c15a5e119f3a117cde6d185bde0476e0249c0ec16b0b", "product_code": "Mozilla Thunderbird 150.0.2 (x64 en-US)", "install_modes": [ "interactive", "silent" ], "switches": { "silent": "/S /PreventRebootRequired=true", "silent_with_progress": "/S /PreventRebootRequired=true", "install_location": "/InstallDirectoryPath=\"\"" }, "upgrade_behavior": "install", "protocols": [ "mailto", "mid", "webcal", "webcals" ], "file_extensions": [ "eml", "ics", "wdseml" ] } ] }, { "platform": "windows", "version": "150.0.1", "release_date": "2026-04-30", "release_notes": "What’s Fixed\nfixed\nThunderbird could crash when processing message headers\nfixed\nSecurity fixes", 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"platform": "windows", "architecture": "x64", "type": "nullsoft", "scope": "machine", "url": "https://download-installer.cdn.mozilla.net/pub/thunderbird/releases/150.0.1/win64/en-US/Thunderbird%20Setup%20150.0.1.exe", "host": "download-installer.cdn.mozilla.net", "filename": "Thunderbird Setup 150.0.1.exe", "sha256": "5a3581a8fae3bccc4b6d62f53eb7d6a64e2edf74d2a57224ede9b79f122c76f0", "product_code": "Mozilla Thunderbird 150.0.1 (x64 en-US)", "install_modes": [ "interactive", "silent" ], "switches": { "silent": "/S /PreventRebootRequired=true", "silent_with_progress": "/S /PreventRebootRequired=true", "install_location": "/InstallDirectoryPath=\"\"" }, "upgrade_behavior": "install", "protocols": [ "mailto", "mid", "webcal", "webcals" ], "file_extensions": [ "eml", "ics", "wdseml" ] } ] }, { "platform": "windows", "version": "150.0", "release_date": "2026-04-21", "release_notes": "What’s New\nnew\n'Recent Destinations' in General Settings now supports alphabetical sorting\nnew\nAdded support for generating Unobtrusive Signatures (OpenPGP)\nnew\nMessage body search enabled for OpenPGP and S/MIME encrypted messages\nnew\nAccount hub is opened on the first run of Thunderbird\nnew\nAddress book cards can be copied to the clipboard as vCard\nnew\nCustom Accent Color can be chosen in Appearance Settings\nnew\nCalendar month/multiweek views are now scrollable with touch screen\nnew\nPDF pages can be reorganized directly in the PDF viewer\nWhat’s Changed\nchanged\nFlatpak beta app ID changed from org.mozilla.Thunderbird to org.mozilla.thunderbird\nWhat’s Fixed\nfixed\nUnknown command-line arguments passed to Thunderbird did not print warning\nfixed\nThunderbird could crash when creating a folder\nfixed\nSaved email filenames were not not always cross-platform safe\nfixed\nCompose progress dialog used unlocalised folder name\nfixed\nClicking on a folder in the folder pane did not always open folder\nfixed\nCould not scroll to message bottom or view all attachments in some 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"download-installer.cdn.mozilla.net", "filename": "Thunderbird Setup 150.0.exe", "sha256": "d60a4d724669d34c87ca61425ddaf08fd5284f54d966cdcb1d523f732b9ae300", "product_code": "Mozilla Thunderbird 150.0 (x64 en-US)", "install_modes": [ "interactive", "silent" ], "switches": { "silent": "/S /PreventRebootRequired=true", "silent_with_progress": "/S /PreventRebootRequired=true", "install_location": "/InstallDirectoryPath=\"\"" }, "upgrade_behavior": "install", "protocols": [ "mailto", "mid", "webcal", "webcals" ], "file_extensions": [ "eml", "ics", "wdseml" ] } ] }, { "platform": "windows", "version": "149.0.2", "release_date": "2026-04-07", "release_notes": "What’s Fixed\nfixed\nSecurity fixes", "release_notes_url": "https://www.thunderbird.net/thunderbird/149.0.2/releasenotes/", "manifest_version": "1.12.0", "manifest_dir": "manifests/m/Mozilla/Thunderbird/149.0.2", "installers": [ { "platform": "windows", "architecture": "x86", "type": "nullsoft", "scope": "machine", "url": 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149.0.2.exe", "sha256": "d1f8698853ac99477afcfeca240064d19871857e425daeaa07a57bfaedca628d", "product_code": "Mozilla Thunderbird 149.0.2 (x64 en-US)", "install_modes": [ "interactive", "silent" ], "switches": { "silent": "/S /PreventRebootRequired=true", "silent_with_progress": "/S /PreventRebootRequired=true", "install_location": "/InstallDirectoryPath=\"\"" }, "upgrade_behavior": "install", "protocols": [ "mailto", "mid", "webcal", "webcals" ], "file_extensions": [ "eml", "ics", "wdseml" ] } ] }, { "platform": "windows", "version": "149.0.1", "release_date": "2026-03-26", "release_notes": "What’s Changed\nchanged\nThere are no Thunderbird changes requiring release notes in this release", "release_notes_url": "https://www.thunderbird.net/thunderbird/149.0.1/releasenotes/", "manifest_version": "1.12.0", "manifest_dir": "manifests/m/Mozilla/Thunderbird/149.0.1", "installers": [ { "platform": "windows", "architecture": "x86", "type": "nullsoft", "scope": "machine", "url": "https://download-installer.cdn.mozilla.net/pub/thunderbird/releases/149.0.1/win32/en-US/Thunderbird%20Setup%20149.0.1.exe", "host": "download-installer.cdn.mozilla.net", "filename": "Thunderbird Setup 149.0.1.exe", "sha256": "916f68ecfb8a46827019cd31d3bb4514a90578acac2167f3fd4b62762c3f4092", "product_code": "Mozilla Thunderbird 149.0.1 (x86 en-US)", "install_modes": [ "interactive", "silent" ], "switches": { "silent": "/S /PreventRebootRequired=true", "silent_with_progress": "/S /PreventRebootRequired=true", "install_location": "/InstallDirectoryPath=\"\"" }, "upgrade_behavior": "install", "protocols": [ "mailto", "mid", "webcal", "webcals" ], "file_extensions": [ "eml", "ics", "wdseml" ] }, { "platform": "windows", "architecture": "x64", "type": "nullsoft", "scope": "machine", "url": "https://download-installer.cdn.mozilla.net/pub/thunderbird/releases/149.0.1/win64/en-US/Thunderbird%20Setup%20149.0.1.exe", "host": "download-installer.cdn.mozilla.net", "filename": "Thunderbird Setup 149.0.1.exe", "sha256": "2bd04b5a0714390c1dbbd915264e6625710e41ec99b36a3115b7fdb8afc54de1", "product_code": "Mozilla Thunderbird 149.0.1 (x64 en-US)", "install_modes": [ "interactive", "silent" ], "switches": { "silent": "/S /PreventRebootRequired=true", "silent_with_progress": "/S /PreventRebootRequired=true", "install_location": "/InstallDirectoryPath=\"\"" }, "upgrade_behavior": "install", "protocols": [ "mailto", "mid", "webcal", "webcals" ], "file_extensions": [ "eml", "ics", "wdseml" ] } ] }, { "platform": "windows", "version": "149.0", "release_date": "2026-03-24", "release_notes": "What’s New\nnew\nEnable exporting selected address book cards\nnew\nStarred EWS messages now persist across devices\nWhat’s Changed\nchanged\nAddress books are now created in Account Hub\nWhat’s Fixed\nfixed\nShift-click for 'Edit' button in drafts header view did not work\nfixed\n\"Replace All\" in Compose did not update plain text until dialog closed\nfixed\n\"Repair text encoding\" could duplicate recipient and attachments\nfixed\nLink colors were difficult to read in dark themes\nfixed\nPressing Delete on Trash folder could remove it without confirmation\nfixed\nRenaming of a 'unified folder' created a duplicate\nfixed\nFolder tree \"new messages\" star no longer displayed\nfixed\nReason for revoked certificate was not shown\nfixed\n\"Open and show\" for OpenPGP signed message could fail if headers after content-type\nfixed\nEncrypted Gmail CSE emails with outer opaque S/MIME were not readable\nfixed\n\"Generate and save a CSR file as... \" no longer worked for S/MIME\nfixed\nCancelled attachment reminder in compose did not return focus to message body\nfixed\nThunderbird could crash while importing mail thread\nfixed\nUnlabeled column visibility toggle button was not announced by screen readers\nfixed\nCould not save message to external file from EWS account\nfixed\n\"After Sending\" filters were not working correctly\nfixed\nThunderbird did not report refused POP3 connection\nfixed\nEWS messages could fail to sync in some scenarios\nfixed\nRemove message body retention policy was not functional\nfixed\nPublish Calendar only showed empty OK/Cancel popup and did not publish\nfixed\nDismissed Gmail calendar reminder did nothing and item stayed visible\nfixed\nCould not export local calendar as HTML\nfixed\nCancelled filter edit dialog closed the message filter dialog\nfixed\nVisual and UX improvements\nfixed\nSecurity fixes", "release_notes_url": "https://www.thunderbird.net/thunderbird/149.0/releasenotes/", "manifest_version": "1.12.0", "manifest_dir": "manifests/m/Mozilla/Thunderbird/149.0", "installers": [ { "platform": "windows", "architecture": "x86", "type": "nullsoft", "scope": "machine", "url": "https://download-installer.cdn.mozilla.net/pub/thunderbird/releases/149.0/win32/en-US/Thunderbird%20Setup%20149.0.exe", "host": "download-installer.cdn.mozilla.net", "filename": "Thunderbird Setup 149.0.exe", "sha256": "9a5d4f04687ced9de42a4da5560a64e193e536528b6c7dbdf0b56983be2e15b7", "product_code": "Mozilla Thunderbird 149.0 (x86 en-US)", "install_modes": [ "interactive", "silent" ], "switches": { "silent": "/S /PreventRebootRequired=true", "silent_with_progress": "/S /PreventRebootRequired=true", "install_location": "/InstallDirectoryPath=\"\"" }, "upgrade_behavior": "install", "protocols": [ "mailto", "mid", "webcal", "webcals" ], "file_extensions": [ "eml", "ics", "wdseml" ] }, { "platform": "windows", "architecture": "x64", "type": "nullsoft", "scope": "machine", "url": "https://download-installer.cdn.mozilla.net/pub/thunderbird/releases/149.0/win64/en-US/Thunderbird%20Setup%20149.0.exe", "host": "download-installer.cdn.mozilla.net", "filename": "Thunderbird Setup 149.0.exe", "sha256": "8531249694699cd50659e818ffb7d4f578c5c998d839f821004b6f19fe3e2a1d", "product_code": "Mozilla Thunderbird 149.0 (x64 en-US)", "install_modes": [ "interactive", "silent" ], "switches": { "silent": "/S /PreventRebootRequired=true", "silent_with_progress": "/S /PreventRebootRequired=true", "install_location": "/InstallDirectoryPath=\"\"" }, "upgrade_behavior": "install", "protocols": [ "mailto", "mid", "webcal", "webcals" ], "file_extensions": [ "eml", "ics", "wdseml" ] } ] }, { "platform": "windows", "version": "148.0.1", "release_date": "2026-03-10", "release_notes": "What’s Fixed\nfixed\nLDAP with password stopped working in 148.0", "release_notes_url": "https://www.thunderbird.net/thunderbird/148.0.1/releasenotes/", "manifest_version": "1.12.0", "manifest_dir": "manifests/m/Mozilla/Thunderbird/148.0.1", "installers": [ { "platform": "windows", "architecture": "x86", "type": "nullsoft", "scope": "machine", "url": "https://download-installer.cdn.mozilla.net/pub/thunderbird/releases/148.0.1/win32/en-US/Thunderbird%20Setup%20148.0.1.exe", "host": "download-installer.cdn.mozilla.net", "filename": "Thunderbird Setup 148.0.1.exe", "sha256": "98f2c235ba3df1db47bd912ede2170fdbd308173e1a6216cb112228b32734481", "product_code": "Mozilla Thunderbird 148.0.1 (x86 en-US)", "install_modes": [ "interactive", "silent" ], "switches": { "silent": "/S /PreventRebootRequired=true", "silent_with_progress": "/S /PreventRebootRequired=true", "install_location": "/InstallDirectoryPath=\"\"" }, "upgrade_behavior": "install", "protocols": [ "mailto", "mid", "webcal", "webcals" ], "file_extensions": [ "eml", "ics", "wdseml" ] }, { "platform": "windows", "architecture": "x64", "type": "nullsoft", "scope": "machine", "url": "https://download-installer.cdn.mozilla.net/pub/thunderbird/releases/148.0.1/win64/en-US/Thunderbird%20Setup%20148.0.1.exe", "host": "download-installer.cdn.mozilla.net", "filename": "Thunderbird Setup 148.0.1.exe", "sha256": "afc796448b761182f42881fe34eb7aa95ad9de4e1b53b9965deecf614ff44621", "product_code": "Mozilla Thunderbird 148.0.1 (x64 en-US)", "install_modes": [ "interactive", "silent" ], "switches": { "silent": "/S /PreventRebootRequired=true", "silent_with_progress": "/S /PreventRebootRequired=true", "install_location": "/InstallDirectoryPath=\"\"" }, "upgrade_behavior": "install", "protocols": [ "mailto", "mid", "webcal", "webcals" ], "file_extensions": [ "eml", "ics", "wdseml" ] } ] }, { "platform": "windows", "version": "148.0", "release_date": "2026-02-24", "release_notes": "What’s New\nnew\nAccessiblity is improved in various tree views\nnew\n'Favorites' added as destination for 'Move To' and 'File' buttons\nnew\nAdd mail.openpgp.load_untested_gpgme_version to load untested GPGME version\nnew\nNTLM is exposed as an available authentication method for EWS accounts\nWhat’s Changed\nchanged\nRead folders are now removed from Unread Folders view\nchanged\nYahoo, AT&T, AOL accounts are switched to PKCE, a more secure auth protocol\nWhat’s Fixed\nfixed\nPeriodic new mail checks silently stopped after sleep or network outages\nfixed\nDonation banner stole focus when Thunderbird was running in the background\nfixed\nStatus bar messages displayed unlocalizedd folder names or IMAP mailbox names\nfixed\nNew Folder dialog allowed invalid folder creation without a selected parent folder\nfixed\nNew/unread messages in collapsed thread were not obvious enough\nfixed\nInvalidly signed unencrypted emails were indicated as worse than unsigned ones\nfixed\nUntagged messages were not working correctly with quick filter\nfixed\nCalendar/address book sections were shown in Account Hub when there were none\nfixed\nShortcuts could be executed on background mail window while in Account Hub\nfixed\nAdding a Gmail account prompted for OAuth during auto config\nfixed\nNew password-based Exchange accounts failed to save passwords in login manager\nfixed\n'Move Message to' filter action was not logged\nfixed\nUnknown OAuth providers were not allowed during EWS manual config in AccountHub\nfixed\nSaved search in unified folder resulted in server error\nfixed\nEWS password prompt looped endlessly if the password was empty\nfixed\nAccount Hub manual configuration flow for Exchange accounts was incorrect\nfixed\nGoogle calendars had broken RSVP logic and wrong organizer on new events\nfixed\nCalDAV calendars that invited calendar alias did not give all response options\nfixed\nCalDAV calendar with multiple addresses could crash on multi-attendee invites\nfixed\niCal imports misread unknown timezones as GMT, creating events at wrong times\nfixed\nVisual and UX improvements\nfixed\nSecurity fixes", "release_notes_url": "https://www.thunderbird.net/thunderbird/148.0/releasenotes/", "manifest_version": "1.12.0", "manifest_dir": "manifests/m/Mozilla/Thunderbird/148.0", "installers": [ { "platform": "windows", "architecture": "x86", "type": "nullsoft", "scope": "machine", "url": "https://download-installer.cdn.mozilla.net/pub/thunderbird/releases/148.0/win32/en-US/Thunderbird%20Setup%20148.0.exe", "host": "download-installer.cdn.mozilla.net", "filename": "Thunderbird Setup 148.0.exe", "sha256": "9e33ef69b3b2908d1005f3a5ed07cbf7ad44bc894bebb74b4920b5a5a7a1a6cf", "product_code": "Mozilla Thunderbird 148.0 (x86 en-US)", "install_modes": [ "interactive", "silent" ], "switches": { "silent": "/S /PreventRebootRequired=true", "silent_with_progress": "/S /PreventRebootRequired=true", "install_location": "/InstallDirectoryPath=\"\"" }, "upgrade_behavior": "install", "protocols": [ "mailto", "mid", "webcal", "webcals" ], "file_extensions": [ "eml", "ics", "wdseml" ] }, { "platform": "windows", "architecture": "x64", "type": "nullsoft", "scope": "machine", "url": "https://download-installer.cdn.mozilla.net/pub/thunderbird/releases/148.0/win64/en-US/Thunderbird%20Setup%20148.0.exe", "host": "download-installer.cdn.mozilla.net", "filename": "Thunderbird Setup 148.0.exe", "sha256": "8dd53cee495adb2d88c23516f0d620b22176759e48972f29aed59edb0b62ea41", "product_code": "Mozilla Thunderbird 148.0 (x64 en-US)", "install_modes": [ "interactive", "silent" ], "switches": { "silent": "/S /PreventRebootRequired=true", "silent_with_progress": "/S /PreventRebootRequired=true", "install_location": "/InstallDirectoryPath=\"\"" }, "upgrade_behavior": "install", "protocols": [ "mailto", "mid", "webcal", "webcals" ], "file_extensions": [ "eml", "ics", "wdseml" ] } ] }, { "platform": "windows", "version": "147.0.2", "release_date": "2026-02-16", "release_notes": "What’s Fixed\nfixed\nSecurity fixes", "release_notes_url": "https://www.thunderbird.net/thunderbird/147.0.2/releasenotes/", "manifest_version": "1.12.0", "manifest_dir": "manifests/m/Mozilla/Thunderbird/147.0.2", "installers": [ { "platform": "windows", "architecture": "x86", "type": "nullsoft", "scope": "machine", "url": "https://download-installer.cdn.mozilla.net/pub/thunderbird/releases/147.0.2/win32/en-US/Thunderbird%20Setup%20147.0.2.exe", "host": "download-installer.cdn.mozilla.net", "filename": "Thunderbird Setup 147.0.2.exe", "sha256": "c4601bbad5c2a194bd13e5387776ebce1e73e17173293778c9ac1af47520ee1c", "product_code": "Mozilla Thunderbird 147.0.2 (x86 en-US)", "install_modes": [ "interactive", "silent" ], "switches": { "silent": "/S /PreventRebootRequired=true", "silent_with_progress": "/S /PreventRebootRequired=true", "install_location": "/InstallDirectoryPath=\"\"" }, "upgrade_behavior": "install", "protocols": [ "mailto", "mid", "webcal", "webcals" ], "file_extensions": [ "eml", "ics", "wdseml" ] }, { "platform": "windows", "architecture": "x64", "type": "nullsoft", "scope": "machine", "url": "https://download-installer.cdn.mozilla.net/pub/thunderbird/releases/147.0.2/win64/en-US/Thunderbird%20Setup%20147.0.2.exe", "host": "download-installer.cdn.mozilla.net", "filename": "Thunderbird Setup 147.0.2.exe", "sha256": "c696db24648f0123ae387f9ac21307034707348d13bd82d150ce775dbaeeaf17", "product_code": "Mozilla Thunderbird 147.0.2 (x64 en-US)", "install_modes": [ "interactive", "silent" ], "switches": { "silent": "/S /PreventRebootRequired=true", "silent_with_progress": "/S /PreventRebootRequired=true", "install_location": "/InstallDirectoryPath=\"\"" }, "upgrade_behavior": "install", "protocols": [ "mailto", "mid", "webcal", "webcals" ], "file_extensions": [ "eml", "ics", "wdseml" ] } ] }, { "platform": "windows", "version": "147.0.1", "release_date": "2026-01-28", "release_notes": "What’s Fixed\nfixed\nThunderbird crashed during search, even when not actively searching\nfixed\nSecurity fixes", "release_notes_url": "https://www.thunderbird.net/thunderbird/147.0.1/releasenotes/", "manifest_version": "1.12.0", "manifest_dir": "manifests/m/Mozilla/Thunderbird/147.0.1", "installers": [ { "platform": "windows", "architecture": "x86", "type": "nullsoft", "scope": "machine", "url": "https://download-installer.cdn.mozilla.net/pub/thunderbird/releases/147.0.1/win32/en-US/Thunderbird%20Setup%20147.0.1.exe", "host": "download-installer.cdn.mozilla.net", "filename": "Thunderbird Setup 147.0.1.exe", "sha256": "6f6146700ace07b9ec8bd19db85c4562bdedcfb72b70f8850e66180938045b9d", "product_code": "Mozilla Thunderbird 147.0.1 (x86 en-US)", "install_modes": [ "interactive", "silent" ], "switches": { "silent": "/S /PreventRebootRequired=true", "silent_with_progress": "/S /PreventRebootRequired=true", "install_location": "/InstallDirectoryPath=\"\"" }, "upgrade_behavior": "install", "protocols": [ "mailto", "mid", "webcal", "webcals" ], "file_extensions": [ "eml", "ics", "wdseml" ] }, { "platform": "windows", "architecture": "x64", "type": "nullsoft", "scope": "machine", "url": "https://download-installer.cdn.mozilla.net/pub/thunderbird/releases/147.0.1/win64/en-US/Thunderbird%20Setup%20147.0.1.exe", "host": "download-installer.cdn.mozilla.net", "filename": "Thunderbird Setup 147.0.1.exe", "sha256": "9423706cd055a82b1cf80ac7a2667268148e7a605f65d4cf5bb0383421a7ac1f", "product_code": "Mozilla Thunderbird 147.0.1 (x64 en-US)", "install_modes": [ "interactive", "silent" ], "switches": { "silent": "/S /PreventRebootRequired=true", "silent_with_progress": "/S /PreventRebootRequired=true", "install_location": "/InstallDirectoryPath=\"\"" }, "upgrade_behavior": "install", "protocols": [ "mailto", "mid", "webcal", "webcals" ], "file_extensions": [ "eml", "ics", "wdseml" ] } ] }, { "platform": "windows", "version": "147.0", "release_date": "2026-01-13", "release_notes": "What’s New\nnew\nAdd \"Show Full Path\" folder pane option for compact view modes\nnew\nAdd `mail.useLocalizedFolderNames' to toggle special folder name localization\nWhat’s Changed\nchanged\nSpecial folders are now localized based on a restricted set of names\nWhat’s Fixed\nfixed\nSelected status and priority was not displayed in search widgets\nfixed\nCompacting multiple folders failed and did not compact\nfixed\nResetting manual folder sorting did not work for sub folders\nfixed\nUnified archive subfolders could show wrong names and no messages\nfixed\nFolders with deep hierarchy and long folder names could fail to display\nfixed\nMoving saved search/virtual folder under IMAP could fail\nfixed\n\"Open and Show\" for OpenPGP-signed message (.eml) did not work\nfixed\n\"Search Messages\" search did not finish due to unparsable local folders\nfixed\nCompose command line flag no longer worked correctly\nfixed\nSearch for \"Attachment\" in Settings menu did not find \"Files and Attachments\"\nfixed\nAccount Hub did not show error message on failure when creating OAuth2 EWS account\nfixed\nThunderbird could crash during exchange address account setup\nfixed\nJapanese locale users could not create message filters\nfixed\nMoving virtual folder within maildir based IMAP or local folder could fail\nfixed\nThunderbird could crash when marking all messages as read\nfixed\nStartup could be slow with large number of folders not using subscriptions\nfixed\nEWS message send that required a password errored instead of prompting\nfixed\nEWS HTTP 500 backoff errors were not handled gracefully\nfixed\nSMTP sending could hang when when multiple messages queued for sending\nfixed\nThunderbird could crash when emptying EWS trash\nfixed\nBroken feed icon could prevent updating of feeds\nfixed\nCalendar did not alert user for connection issues\nfixed\nCreation of tasks with Start or Due date was not possible\nfixed\nVisual and UX improvements\nfixed\nSecurity fixes", "release_notes_url": "https://www.thunderbird.net/thunderbird/147.0/releasenotes/", "manifest_version": "1.12.0", "manifest_dir": "manifests/m/Mozilla/Thunderbird/147.0", "installers": [ { "platform": "windows", "architecture": "x86", "type": "nullsoft", "scope": "machine", "url": "https://download-installer.cdn.mozilla.net/pub/thunderbird/releases/147.0/win32/en-US/Thunderbird%20Setup%20147.0.exe", "host": "download-installer.cdn.mozilla.net", "filename": "Thunderbird Setup 147.0.exe", "sha256": "99e17a576d21e4214d9df63733dccf4e34bef534768ca76baf148c40d5b6716e", "product_code": "Mozilla Thunderbird 147.0 (x86 en-US)", "install_modes": [ "interactive", "silent" ], "switches": { "silent": "/S /PreventRebootRequired=true", "silent_with_progress": "/S /PreventRebootRequired=true", "install_location": "/InstallDirectoryPath=\"\"" }, "upgrade_behavior": "install", "protocols": [ "mailto", "mid", "webcal", "webcals" ], "file_extensions": [ "eml", "ics", "wdseml" ] }, { "platform": "windows", "architecture": "x64", "type": "nullsoft", "scope": "machine", "url": "https://download-installer.cdn.mozilla.net/pub/thunderbird/releases/147.0/win64/en-US/Thunderbird%20Setup%20147.0.exe", "host": "download-installer.cdn.mozilla.net", "filename": "Thunderbird Setup 147.0.exe", "sha256": "91d1aa789911439a671ddc7d4f97fde6e4160242828560942e5eb38a6be39351", "product_code": "Mozilla Thunderbird 147.0 (x64 en-US)", "install_modes": [ "interactive", "silent" ], "switches": { "silent": "/S /PreventRebootRequired=true", "silent_with_progress": "/S /PreventRebootRequired=true", "install_location": "/InstallDirectoryPath=\"\"" }, "upgrade_behavior": "install", "protocols": [ "mailto", "mid", "webcal", "webcals" ], "file_extensions": [ "eml", "ics", "wdseml" ] } ] }, { "platform": "windows", "version": "146.0.1", "release_date": "2025-12-17", "release_notes": "What’s Fixed\nfixed\nReverted fix that localized consistent special folder names in server’s language", "release_notes_url": "https://www.thunderbird.net/thunderbird/146.0.1/releasenotes/", "manifest_version": "1.10.0", "manifest_dir": "manifests/m/Mozilla/Thunderbird/146.0.1", "installers": [ { "platform": "windows", "architecture": "x86", "type": "nullsoft", "scope": "machine", "url": "https://download-installer.cdn.mozilla.net/pub/thunderbird/releases/146.0.1/win32/en-US/Thunderbird%20Setup%20146.0.1.exe", "host": "download-installer.cdn.mozilla.net", "filename": "Thunderbird Setup 146.0.1.exe", "sha256": "ddc5a87c6bf02bbe86b6ba823c92e713bbac479b238136a319aec78656349189", "product_code": "Mozilla Thunderbird 146.0.1 (x86 en-US)", "install_modes": [ "interactive", "silent" ], "switches": { "silent": "/S /PreventRebootRequired=true", "silent_with_progress": "/S /PreventRebootRequired=true", "install_location": "/InstallDirectoryPath=\"\"" }, "upgrade_behavior": "install", "protocols": [ "mailto", "mid", "webcal", "webcals" ], "file_extensions": [ "eml", "ics", "wdseml" ] }, { "platform": "windows", "architecture": "x64", "type": "nullsoft", "scope": "machine", "url": "https://download-installer.cdn.mozilla.net/pub/thunderbird/releases/146.0.1/win64/en-US/Thunderbird%20Setup%20146.0.1.exe", "host": "download-installer.cdn.mozilla.net", "filename": "Thunderbird Setup 146.0.1.exe", "sha256": "ef7183efd37cc7c69d9b5f11a41db72b23f3e669d223ab08404a4a05d434e30d", "product_code": "Mozilla Thunderbird 146.0.1 (x64 en-US)", "install_modes": [ "interactive", "silent" ], "switches": { "silent": "/S /PreventRebootRequired=true", "silent_with_progress": "/S /PreventRebootRequired=true", "install_location": "/InstallDirectoryPath=\"\"" }, "upgrade_behavior": "install", "protocols": [ "mailto", "mid", "webcal", "webcals" ], "file_extensions": [ "eml", "ics", "wdseml" ] } ] }, { "platform": "windows", "version": "146.0", "release_date": "2025-12-10", "release_notes": "What’s New\nnew\nEnabled configuration of preferred OpenPGP keyserver via the UI\nWhat’s Changed\nchanged\nExisting logins are migrated to make use of more modern AES cryptography\nWhat’s Fixed\nfixed\nMemory was not cleaned up after opening New Window from folder pane context menu\nfixed\nThunderbird could crash in server subscription logic\nfixed\nImporting a vCard only displayed VCF files in the file picker\nfixed\nCould not distinguish folders with same name in 'Recent Destinations' and 'Favorites'\nfixed\nCould not compose new message if the folder pane was empty\nfixed\n'Delete' was missing from context menu when multiple IMAP folders were selected\nfixed\n'Delete' button in unified toolbar could delete attachments instead of message\nfixed\n'Recent destinations' submenu was not sorted by time of modification\nfixed\nAccount column could display incorrect account name\nfixed\n'Tag' submenu of mail context menu could be populated incorrectly\nfixed\nExtending the expiration date of OpenPGP key set incorrect date\nfixed\nCould not sign/encrypt (PGP) when using -compose and Thunderbird was not running\nfixed\nAccount Hub email success messages were not always accurate about config source\nfixed\nAccount Hub advanced config setup did not include default outgoing config\nfixed\nAccount Hub local address book creation could continue with blank name\nfixed\nDetailed security exception dialog was not shown when adding certificate exception\nfixed\nThe default account could be reset after restart if uninitialized\nfixed\nOpening a vCard (.vcf) from file manager or CLI did not work in some cases\nfixed\nDragging attachments on macOS to folder or desktop no longer worked\nfixed\nEWS folder properties \"Select this folder for offline use\" did not work\nfixed\nThunderbird could crash when mail folder was renamed or moved\nfixed\nAccount Hub could fail when manually creating EWS account\nfixed\n'Offline' folder flag for EWS folders was reset on restart\nfixed\n'Open with' of Microsoft Office attachment did not mark file with MOTW label\nfixed\nVisual and UX improvements\nfixed\nSecurity fixes", "release_notes_url": "https://www.thunderbird.net/thunderbird/146.0/releasenotes/", "manifest_version": "1.10.0", "manifest_dir": "manifests/m/Mozilla/Thunderbird/146.0", "installers": [ { "platform": "windows", "architecture": "x86", "type": "nullsoft", "scope": "machine", "url": "https://download-installer.cdn.mozilla.net/pub/thunderbird/releases/146.0/win32/en-US/Thunderbird%20Setup%20146.0.exe", "host": "download-installer.cdn.mozilla.net", "filename": "Thunderbird Setup 146.0.exe", "sha256": "ce1185531a207578e7cd09edc46c49dd287db2129bced537d176a9dbdcdc97b8", "product_code": "Mozilla Thunderbird 146.0 (x86 en-US)", "install_modes": [ "interactive", "silent" ], "switches": { "silent": "/S /PreventRebootRequired=true", "silent_with_progress": "/S /PreventRebootRequired=true", "install_location": "/InstallDirectoryPath=\"\"" }, "upgrade_behavior": "install", "protocols": [ "mailto", "mid", "webcal", "webcals" ], "file_extensions": [ "eml", "ics", "wdseml" ] }, { "platform": "windows", "architecture": "x64", "type": "nullsoft", "scope": "machine", "url": "https://download-installer.cdn.mozilla.net/pub/thunderbird/releases/146.0/win64/en-US/Thunderbird%20Setup%20146.0.exe", "host": "download-installer.cdn.mozilla.net", "filename": "Thunderbird Setup 146.0.exe", "sha256": "7e0c22721f3b822ae962070152847e1a499c7772d694e191c154868bcc58df38", "product_code": "Mozilla Thunderbird 146.0 (x64 en-US)", "install_modes": [ "interactive", "silent" ], "switches": { "silent": "/S /PreventRebootRequired=true", "silent_with_progress": "/S /PreventRebootRequired=true", "install_location": "/InstallDirectoryPath=\"\"" }, "upgrade_behavior": "install", "protocols": [ "mailto", "mid", "webcal", "webcals" ], "file_extensions": [ "eml", "ics", "wdseml" ] } ] }, { "platform": "windows", "version": "145.0", "release_date": "2025-11-13", "release_notes": "What’s New\nnew\nEnable support for DNS over HTTPS\nnew\nAccount Hub email manual config option added\nnew\nAdd manual configuration to EWS account creation\nnew\nEnable support for Microsoft Exchange via Exchange Web Services\nWhat’s Changed\nchanged\nSkype has been retired and therefore dropped from Address book IM selection\nchanged\nRemoved pref default_supports_diskspace.{HOST}\nchanged\nRemoved pref default_offline_support_level.{HOST}\nchanged\nUse of the string \"Junk\" has been replaced with \"Spam\"\nchanged\nStop shipping 32-bit Linux x86 binaries\nWhat’s Fixed\nfixed\n'Save All' attachments with same names overwrote existing files without warning\nfixed\nMessage headers were re-downloaded at every startup\nfixed\nCould not drag and drop ICS file to Today Pane\nfixed\n'Show remote content' did not display remote content for EML message\nfixed\nEmoji sequences were not properly handled in subject lines\nfixed\nUnified toolbar Spam button did not switch to \"Not Spam\" when spam message selected\nfixed\nUpgrading Thunderbird hid the Menu bar\nfixed\nWhen configuring external GnuPG, user was not promted to import public key\nfixed\nMessage compose window could incorrectly disappear from Task Bar on Windows\nfixed\nAdd-on account creation did not work with Account Hub\nfixed\nOwl install did not show link to website in Account Hub\nfixed\nUsername field did not appear in Account Hub when exchange authentication failed\nfixed\nDisabled inputs could be toggled in Account Hub address book\nfixed\nManual account setup in Account Hub defaulted Connection Security to None\nfixed\nClose button from Account Hub was not narrated\nfixed\nAccount Hub email creation error notifications were not narrated\nfixed\nUsers could not disable spinning overlay in Account Hub for email\nfixed\nDeleted account data remained in \"Export to mobile device\" menu\nfixed\n'Sent' and 'Spam' folders were not always created when setting up new IMAP accounts\nfixed\nSome third-party hosted accounts could not be created in Account Hub\nfixed\nAccount Hub allowed keyboard shortcuts to be executed in background screen\nfixed\nSpam was not checked with mail.server.default.check_all_folders_for_new on\nfixed\nUpgrade from 128.x->140.x broke authentication for @att.net using Yahoo backend\nfixed\nTask reminders could fail for tasks without end dates or with shifted due dates\nfixed\nVisual and UX improvements\nfixed\nSecurity fixes", "release_notes_url": "https://www.thunderbird.net/thunderbird/145.0/releasenotes/", "manifest_version": "1.10.0", "manifest_dir": "manifests/m/Mozilla/Thunderbird/145.0", "installers": [ { "platform": "windows", "architecture": "x86", "type": "nullsoft", "scope": "machine", "url": "https://download-installer.cdn.mozilla.net/pub/thunderbird/releases/145.0/win32/en-US/Thunderbird%20Setup%20145.0.exe", "host": "download-installer.cdn.mozilla.net", "filename": "Thunderbird Setup 145.0.exe", "sha256": "353728892f918efc09564945eb7b7bab53db8808cceef189c8053233aabe439d", "product_code": "Mozilla Thunderbird 145.0 (x86 en-US)", "install_modes": [ "interactive", "silent" ], "switches": { "silent": "/S /PreventRebootRequired=true", "silent_with_progress": "/S /PreventRebootRequired=true", "install_location": "/InstallDirectoryPath=\"\"" }, "upgrade_behavior": "install", "protocols": [ "mailto", "mid", "webcal", "webcals" ], "file_extensions": [ "eml", "ics", "wdseml" ] }, { "platform": "windows", "architecture": "x64", "type": "nullsoft", "scope": "machine", "url": "https://download-installer.cdn.mozilla.net/pub/thunderbird/releases/145.0/win64/en-US/Thunderbird%20Setup%20145.0.exe", "host": "download-installer.cdn.mozilla.net", "filename": "Thunderbird Setup 145.0.exe", "sha256": "635cbc52d70ec0d5156d96c4b49e972898526950c198fb674a453a4879858c9e", "product_code": "Mozilla Thunderbird 145.0 (x64 en-US)", "install_modes": [ "interactive", "silent" ], "switches": { "silent": "/S /PreventRebootRequired=true", "silent_with_progress": "/S /PreventRebootRequired=true", "install_location": "/InstallDirectoryPath=\"\"" }, "upgrade_behavior": "install", "protocols": [ "mailto", "mid", "webcal", "webcals" ], "file_extensions": [ "eml", "ics", "wdseml" ] } ] }, { "platform": "windows", "version": "144.0.1", "release_date": "2025-10-16", "release_notes_url": "https://www.thunderbird.net/thunderbird/144.0.1/releasenotes/", "manifest_version": "1.10.0", "manifest_dir": "manifests/m/Mozilla/Thunderbird/144.0.1", "installers": [ { "platform": "windows", "architecture": "x86", "type": "nullsoft", "scope": "machine", "url": "https://download-installer.cdn.mozilla.net/pub/thunderbird/releases/144.0.1/win32/en-US/Thunderbird%20Setup%20144.0.1.exe", "host": "download-installer.cdn.mozilla.net", "filename": "Thunderbird Setup 144.0.1.exe", "sha256": "4c3102b95492aa92eb3b9f4c416bfcbe399788e21d3433e7aa1404c856b69c72", "product_code": "Mozilla Thunderbird 144.0.1 (x86 en-US)", "install_modes": [ "interactive", "silent" ], "switches": { "silent": "/S /PreventRebootRequired=true", "silent_with_progress": "/S /PreventRebootRequired=true", "install_location": "/InstallDirectoryPath=\"\"" }, "upgrade_behavior": "install", "protocols": [ "mailto", "mid", "webcal", "webcals" ], "file_extensions": [ "eml", "ics", "wdseml" ] }, { "platform": "windows", "architecture": "x64", "type": "nullsoft", "scope": "machine", "url": "https://download-installer.cdn.mozilla.net/pub/thunderbird/releases/144.0.1/win64/en-US/Thunderbird%20Setup%20144.0.1.exe", "host": "download-installer.cdn.mozilla.net", "filename": "Thunderbird Setup 144.0.1.exe", "sha256": "9ba06a0740121f260870b5092dc0df6abf6e3bc6e5c59f727b0a9b8fc01a5fe8", "product_code": "Mozilla Thunderbird 144.0.1 (x64 en-US)", "install_modes": [ "interactive", "silent" ], "switches": { "silent": "/S /PreventRebootRequired=true", "silent_with_progress": "/S /PreventRebootRequired=true", "install_location": "/InstallDirectoryPath=\"\"" }, "upgrade_behavior": "install", "protocols": [ "mailto", "mid", "webcal", "webcals" ], "file_extensions": [ "eml", "ics", "wdseml" ] } ] }, { "platform": "windows", "version": "144.0", "release_date": "2025-10-14", "release_notes": "What’s Changed\nchanged\nFlatpak runtime has been updated to Freedesktop SDK 24.08\nWhat’s Fixed\nfixed\nCopying text from some error alerts was not possible\nfixed\nFastmail CalDAV app password access failed due to forced OAuth regression\nfixed\nDelete key failed to prevent deleting attachments in OpenPGP messages\nfixed\nNewly created folder was missing under \"Recent\" when moving a message\nfixed\nSender avatar displayed incorrectly for 'Name' via address sender format\nfixed\nSorting by threads only brought threads with unread top messages to the top\nfixed\nNews message marked read after NNTP error prevented retrieval from server\nfixed\nInbox 'Location' column was not translated in French locale installation\nfixed\nNot all headers were signed when creating digitally signed OpenPGP email\nfixed\nUsers could not read mail signed with OpenPGP v6 and PQC keys\nfixed\nTesting a configured personal S/MIME certificate for a sub-identity did not work\nfixed\nTesting an S/MIME certificate did not work for an old invalid certificate\nfixed\nChanging identity in compose window caused modified draft not to be saved\nfixed\nShift-click 'Compose Message To' on 'mailto' link did not open in plain text\nfixed\nImage preview in Insert Image dialog failed with CSP error for web resources\nfixed\nThunderbird could crash in various scenarios\nfixed\n'Copy Message to' action in a newsgroup filter did not work\nfixed\nThunderbird could not import profile located at the top level of zip file\nfixed\nThunderbird did not clearly fail when importing profile from a bad source\nfixed\nNo way to distinguish between Thunderbird Release/ESR in Windows registry\nfixed\nMulti-attachment delete/detach confirmation only cited first attachment\nfixed\nThunderbird hung when auto-checking multiple accounts for new messages\nfixed\nReply All button was missing when using a Microsoft Exchange account\nfixed\nSending emails via servers with self-signed certificate did not work\nfixed\nTask reminders could fail for tasks without end dates or with shifted due dates\nfixed\nCould not copy an event in multiweek or month view by drag-and-drop\nfixed\nCalendar discovery with certificate error displayed multiple exceptions\nfixed\nVisual and UX improvements\nfixed\nSecurity fixes", "release_notes_url": "https://www.thunderbird.net/thunderbird/144.0/releasenotes/", "manifest_version": "1.10.0", "manifest_dir": "manifests/m/Mozilla/Thunderbird/144.0", "installers": [ { "platform": "windows", "architecture": "x86", "type": "nullsoft", "scope": "machine", "url": "https://download-installer.cdn.mozilla.net/pub/thunderbird/releases/144.0/win32/en-US/Thunderbird%20Setup%20144.0.exe", "host": "download-installer.cdn.mozilla.net", "filename": "Thunderbird Setup 144.0.exe", "sha256": "f3af6380750ae5a33bf0975b153caf0f9b544079258cc9354915595b977a2823", "product_code": "Mozilla Thunderbird 144.0 (x86 en-US)", "install_modes": [ "interactive", "silent" ], "switches": { "silent": "/S /PreventRebootRequired=true", "silent_with_progress": "/S /PreventRebootRequired=true", "install_location": "/InstallDirectoryPath=\"\"" }, "upgrade_behavior": "install", "protocols": [ "mailto", "mid", "webcal", "webcals" ], "file_extensions": [ "eml", "ics", "wdseml" ] }, { "platform": "windows", "architecture": "x64", "type": "nullsoft", "scope": "machine", "url": "https://download-installer.cdn.mozilla.net/pub/thunderbird/releases/144.0/win64/en-US/Thunderbird%20Setup%20144.0.exe", "host": "download-installer.cdn.mozilla.net", "filename": "Thunderbird Setup 144.0.exe", "sha256": "fe5ce760fd9540d87d93e5ebaf6427ea049397e3de4ba609a269297e9e969363", "product_code": "Mozilla Thunderbird 144.0 (x64 en-US)", "install_modes": [ "interactive", "silent" ], "switches": { "silent": "/S /PreventRebootRequired=true", "silent_with_progress": "/S /PreventRebootRequired=true", "install_location": "/InstallDirectoryPath=\"\"" }, "upgrade_behavior": "install", "protocols": [ "mailto", "mid", "webcal", "webcals" ], "file_extensions": [ "eml", "ics", "wdseml" ] } ] }, { "platform": "windows", "version": "143.0.1", "release_date": "2025-09-23", "release_notes": "What’s Fixed\nfixed\nThunderbird could crash on startup", "release_notes_url": "https://www.thunderbird.net/thunderbird/143.0.1/releasenotes/", "manifest_version": "1.10.0", "manifest_dir": "manifests/m/Mozilla/Thunderbird/143.0.1", "installers": [ { "platform": "windows", "architecture": "x86", "type": "nullsoft", "scope": "machine", "url": "https://download-installer.cdn.mozilla.net/pub/thunderbird/releases/143.0.1/win32/en-US/Thunderbird%20Setup%20143.0.1.exe", "host": "download-installer.cdn.mozilla.net", "filename": "Thunderbird Setup 143.0.1.exe", "sha256": "65b9324e5258bf4df9e350d4ebfb742b84b412d786aa8f88ea1c819adc6d3189", "product_code": "Mozilla Thunderbird 143.0.1 (x86 en-US)", "install_modes": [ "interactive", "silent" ], "switches": { "silent": "/S /PreventRebootRequired=true", "silent_with_progress": "/S /PreventRebootRequired=true", "install_location": "/InstallDirectoryPath=\"\"" }, "upgrade_behavior": "install", "protocols": [ "mailto", "mid", "webcal", "webcals" ], "file_extensions": [ "eml", "ics", "wdseml" ] }, { "platform": "windows", "architecture": "x64", "type": "nullsoft", "scope": "machine", "url": "https://download-installer.cdn.mozilla.net/pub/thunderbird/releases/143.0.1/win64/en-US/Thunderbird%20Setup%20143.0.1.exe", "host": "download-installer.cdn.mozilla.net", "filename": "Thunderbird Setup 143.0.1.exe", "sha256": "98369122605e61834db4f6e2f487298c82019819ef3fae1c47c80fbcce7b409f", "product_code": "Mozilla Thunderbird 143.0.1 (x64 en-US)", "install_modes": [ "interactive", "silent" ], "switches": { "silent": "/S /PreventRebootRequired=true", "silent_with_progress": "/S /PreventRebootRequired=true", "install_location": "/InstallDirectoryPath=\"\"" }, "upgrade_behavior": "install", "protocols": [ "mailto", "mid", "webcal", "webcals" ], "file_extensions": [ "eml", "ics", "wdseml" ] } ] }, { "platform": "windows", "version": "143.0", "release_date": "2025-09-16", "release_notes": "What’s Fixed\nfixed\nWeb pages with bad certificates displayed as blank\nfixed\nUsers could no longer send using smtp-relay.gmail.com\nfixed\nChanging to new drafts folder and then back did not correctly restore the folder\nfixed\nOption did not exist to create new address book under File -> New\nfixed\nSome folders showed new mail count prior to receiving mail\nfixed\nMenu bar was hidden after updating from 128esr to 140esr\nfixed\nMenu Bar -> View contained duplicate accelerator keys\nfixed\nWarning was not logged if mail.openpgp.alias_rules_file file did not exist\nfixed\nCmd+Shift+F no longer invoked \"Search Messages\" on macOS\nfixed\nArrow key selection in global search bar skipped every other result\nfixed\nDrag-drop of unselected contact inserted wrong or no email address\nfixed\nThunderbird could crash on startup\nfixed\nAdding an account could fail and cause UI hang\nfixed\nThunderbird could crash when importing mail\nfixed\nWindows new message notification click did not bring Thunderbird to foreground\nfixed\nDelete or detach attachments did not work for some IMAP servers\nfixed\nSaving a new draft retained superceded version\nfixed\nLanguage field in settings was empty after restart in Troubleshoot Mode\nfixed\nVisual and UX improvements\nfixed\nSecurity fixes", "release_notes_url": "https://www.thunderbird.net/thunderbird/143.0/releasenotes/", "manifest_version": "1.10.0", "manifest_dir": "manifests/m/Mozilla/Thunderbird/143.0", "installers": [ { "platform": "windows", "architecture": "x86", "type": "nullsoft", "scope": "machine", "url": "https://download-installer.cdn.mozilla.net/pub/thunderbird/releases/143.0/win32/en-US/Thunderbird%20Setup%20143.0.exe", "host": "download-installer.cdn.mozilla.net", "filename": "Thunderbird Setup 143.0.exe", "sha256": "0a5d38e7678835ef9415f72a926d55e25780eda6633e6ae859885e9ac00a807b", "product_code": "Mozilla Thunderbird 143.0 (x86 en-US)", "install_modes": [ "interactive", "silent" ], "switches": { "silent": "/S /PreventRebootRequired=true", "silent_with_progress": "/S /PreventRebootRequired=true", "install_location": "/InstallDirectoryPath=\"\"" }, "upgrade_behavior": "install", "protocols": [ "mailto", "mid", "webcal", "webcals" ], "file_extensions": [ "eml", "ics", "wdseml" ] }, { "platform": "windows", "architecture": "x64", "type": "nullsoft", "scope": "machine", "url": "https://download-installer.cdn.mozilla.net/pub/thunderbird/releases/143.0/win64/en-US/Thunderbird%20Setup%20143.0.exe", "host": "download-installer.cdn.mozilla.net", "filename": "Thunderbird Setup 143.0.exe", "sha256": "01868aa8c4471de65d7070ecef2526e0305ef51bed485fe73e2c1ce035a85344", "product_code": "Mozilla Thunderbird 143.0 (x64 en-US)", "install_modes": [ "interactive", "silent" ], "switches": { "silent": "/S /PreventRebootRequired=true", "silent_with_progress": "/S /PreventRebootRequired=true", "install_location": "/InstallDirectoryPath=\"\"" }, "upgrade_behavior": "install", "protocols": [ "mailto", "mid", "webcal", "webcals" ], "file_extensions": [ "eml", "ics", "wdseml" ] } ] }, { "platform": "windows", "version": "142.0", "release_date": "2025-08-19", "release_notes": "What’s New\nnew\nVisual signatures can be added to PDF attachments opened in Thunderbird\nnew\n'Copy Message Link' and 'Copy News Link' added to header pane 'More actions'\nnew\nFolder copy enabled within mail server accounts and local folders\nnew\n'Reset Folder Order' option added to folder pane to reset custom folder sorting\nWhat’s Changed\nchanged\n'Copy Message Location' removed from mail context menu\nWhat’s Fixed\nfixed\nUsers with attachments open in tabs saw an error on Thunderbird restart\nfixed\nNotification sounds did not respect operating system's do-not-disturb mode\nfixed\nNon-English localized Thunderbird created English special folders on first start\nfixed\nUsers were unable to use Fastmail calendars due to missing OAuth settings\nfixed\nSending from unified or local folder failed if no default account was set\nfixed\nRight-clicking 'List-ID' -> 'Unsubscribe' created double encoded draft subject\nfixed\nOn Linux, the close caption button was inactive when mouse was in screen corner\nfixed\nToggling dark message mode did not restore focus and scroll position\nfixed\nMessage list scrolled back when returning to mail tab after opening a message\nfixed\nDeleting a single message in folder using 'Group by Sort' failed after CTRL+A\nfixed\nNew newsgroups were not added in alphabetical order by default\nfixed\nAfter updating to version 142, all newsgroup folders were sorted alphabetically\nfixed\nWith Thunderbird closed, clicking a 'mailto:' link to send signed message failed\nfixed\nReplying could fail with mailnews.reply_quoting_selection.multi_word set false\nfixed\nMultiple saves while using 'Options' -> 'Send a Copy' resulted in multiple copies\nfixed\nThunderbird did not display contact photos in WebP format from CardDAV servers\nfixed\nInstallations from Microsoft Store did not open when clicking 'mailto:' links\nfixed\nClicking the backspace icon in the quick filter field cleared the input field\nfixed\nInitial launch had long load times and UI lag while messages downloaded\nfixed\n'Mark' -> 'All Read' affected newsgroup messages that had not been fetched yet\nfixed\nThunderbird could not reconnect to newsgroups after connection loss until restarted\nfixed\nSending a newsgroup post appeared successful when it had actually failed\nfixed\nArchived RSS feed messages were sent to the archive folder of default identity\nfixed\nOpening Website header link in RSS feed incorrectly re-encoded URL parameters\nfixed\nVisual and UX improvements\nfixed\nSecurity fixes", "release_notes_url": "https://www.thunderbird.net/thunderbird/142.0/releasenotes/", "manifest_version": "1.10.0", "manifest_dir": "manifests/m/Mozilla/Thunderbird/142.0", "installers": [ { "platform": "windows", "architecture": "x86", "type": "nullsoft", "scope": "machine", "url": "https://download-installer.cdn.mozilla.net/pub/thunderbird/releases/142.0/win32/en-US/Thunderbird%20Setup%20142.0.exe", "host": "download-installer.cdn.mozilla.net", "filename": "Thunderbird Setup 142.0.exe", "sha256": "fce9b4e162933cbd916e88c178642c2287388ab9fb7449f48a1d5737ba72f4ea", "product_code": "Mozilla Thunderbird 142.0 (x86 en-US)", "install_modes": [ "interactive", "silent" ], "switches": { "silent": "/S /PreventRebootRequired=true", "silent_with_progress": "/S /PreventRebootRequired=true", "install_location": "/InstallDirectoryPath=\"\"" }, "upgrade_behavior": "install", "protocols": [ "mailto", "mid", "webcal", "webcals" ], "file_extensions": [ "eml", "ics", "wdseml" ] }, { "platform": "windows", "architecture": "x64", "type": "nullsoft", "scope": "machine", "url": "https://download-installer.cdn.mozilla.net/pub/thunderbird/releases/142.0/win64/en-US/Thunderbird%20Setup%20142.0.exe", "host": "download-installer.cdn.mozilla.net", "filename": "Thunderbird Setup 142.0.exe", "sha256": "09c64e7189e3243dc0b4be2814692c501a2dcfd137adf1c34717790b35b531c5", "product_code": "Mozilla Thunderbird 142.0 (x64 en-US)", "install_modes": [ "interactive", "silent" ], "switches": { "silent": "/S /PreventRebootRequired=true", "silent_with_progress": "/S /PreventRebootRequired=true", "install_location": "/InstallDirectoryPath=\"\"" }, "upgrade_behavior": "install", "protocols": [ "mailto", "mid", "webcal", "webcals" ], "file_extensions": [ "eml", "ics", "wdseml" ] } ] }, { "platform": "windows", "version": "141.0", "release_date": "2025-07-22", "release_notes": "What’s New\nnew\nAdded 'Archive' action to mail notifications\nnew\nComposer now shows a warning if user's configured OpenPGP key expires soon\nWhat’s Fixed\nfixed\nThunderbird could crash when parsing message state\nfixed\nThe English string for the Angry emoji was incorrectly named as the Yell emoji\nfixed\nIncorrect roaming data directory caused regression on Windows and macOS\nfixed\nMessage archive folder creation could silently stop during async folder creation\nfixed\nFolder compaction could fail to complete due to folder write errors\nfixed\nStatus bar showed previously detached attachment when hovering over a new one\nfixed\nURLs for hovered links in status bar could be immediately overwritten\nfixed\n'Search Messages...' dialog could not be opened outside the email tab\nfixed\nCreating an event or task from mail failed if the mail was opened in a tab\nfixed\nNNTP message pane did not show network error page when network was lost\nfixed\nDelete button could remove attachment instead of message\nfixed\nFolders sorted incorrectly when manually ordering them\nfixed\nNew folders were not added alphabetically if folders manually reordered beforehand\nfixed\n'Any Number' was unavailable in address book search with 'Match all of the following'\nfixed\nContact was not found in Advanced Address Book Search if phone number had a period\nfixed\nThunderbird could crash on startup for POP3\nfixed\n'news:' URIs without specific server had incorrect format displayed in status bar\nfixed\nEnterprise policy use was not indicated in about:preferences with a link to about:policies\nfixed\nVisual and UX improvements\nfixed\nSecurity fixes\nKnown Issues\nunresolved\nPasswords are not remembered in 32-bit MAPI use without a compose window", "release_notes_url": "https://www.thunderbird.net/thunderbird/141.0/releasenotes/", "manifest_version": "1.10.0", "manifest_dir": "manifests/m/Mozilla/Thunderbird/141.0", "installers": [ { "platform": "windows", "architecture": "x86", "type": "nullsoft", "scope": "machine", "url": "https://download-installer.cdn.mozilla.net/pub/thunderbird/releases/141.0/win32/en-US/Thunderbird%20Setup%20141.0.exe", "host": "download-installer.cdn.mozilla.net", "filename": "Thunderbird Setup 141.0.exe", "sha256": "830e5581ec17f375f603b0c1898bfe88a736b6f9d8db68022447432abf8a25a9", "product_code": "Mozilla Thunderbird 141.0 (x86 en-US)", "install_modes": [ "interactive", "silent" ], "switches": { "silent": "/S /PreventRebootRequired=true", "silent_with_progress": "/S /PreventRebootRequired=true", "install_location": "/InstallDirectoryPath=\"\"" }, "upgrade_behavior": "install", "protocols": [ "mailto", "mid", "webcal", "webcals" ], "file_extensions": [ "eml", "ics", "wdseml" ] }, { "platform": "windows", "architecture": "x64", "type": "nullsoft", "scope": "machine", "url": "https://download-installer.cdn.mozilla.net/pub/thunderbird/releases/141.0/win64/en-US/Thunderbird%20Setup%20141.0.exe", "host": "download-installer.cdn.mozilla.net", "filename": "Thunderbird Setup 141.0.exe", "sha256": "77404313379a94dd6c10a244f494e153efdd14230899233449c79b9a11698bf1", "product_code": "Mozilla Thunderbird 141.0 (x64 en-US)", "install_modes": [ "interactive", "silent" ], "switches": { "silent": "/S /PreventRebootRequired=true", "silent_with_progress": "/S /PreventRebootRequired=true", "install_location": "/InstallDirectoryPath=\"\"" }, "upgrade_behavior": "install", "protocols": [ "mailto", "mid", "webcal", "webcals" ], "file_extensions": [ "eml", "ics", "wdseml" ] } ] }, { "platform": "windows", "version": "140.0.1", "release_date": "2025-07-09", "release_notes": "What’s Fixed\nfixed\nInserting a link into an HTML mail did not work as expected\nKnown Issues\nunresolved\nPasswords are not remembered in 32-bit MAPI use without a compose window", "release_notes_url": "https://www.thunderbird.net/thunderbird/140.0.1/releasenotes/", "manifest_version": "1.10.0", "manifest_dir": "manifests/m/Mozilla/Thunderbird/140.0.1", "installers": [ { "platform": "windows", "architecture": "x86", "type": "nullsoft", "scope": "machine", "url": "https://download-installer.cdn.mozilla.net/pub/thunderbird/releases/140.0.1/win32/en-US/Thunderbird%20Setup%20140.0.1.exe", "host": "download-installer.cdn.mozilla.net", "filename": "Thunderbird Setup 140.0.1.exe", "sha256": "0c9aaaad2b21a505c4226758c162d067f64f4a3b7ca33aace8647d9b56e8469e", "product_code": "Mozilla Thunderbird 140.0.1 (x86 en-US)", "install_modes": [ "interactive", "silent" ], "switches": { "silent": "/S /PreventRebootRequired=true", "silent_with_progress": "/S /PreventRebootRequired=true", "install_location": "/InstallDirectoryPath=\"\"" }, "upgrade_behavior": "install", "protocols": [ "mailto", "mid", "webcal", "webcals" ], "file_extensions": [ "eml", "ics", "wdseml" ] }, { "platform": "windows", "architecture": "x64", "type": "nullsoft", "scope": "machine", "url": "https://download-installer.cdn.mozilla.net/pub/thunderbird/releases/140.0.1/win64/en-US/Thunderbird%20Setup%20140.0.1.exe", "host": "download-installer.cdn.mozilla.net", "filename": "Thunderbird Setup 140.0.1.exe", "sha256": "8d10b916c9d41977fba8c63f23cc262c8aac418f2501816fcd6473ba5fbad6cd", "product_code": "Mozilla Thunderbird 140.0.1 (x64 en-US)", "install_modes": [ "interactive", "silent" ], "switches": { "silent": "/S /PreventRebootRequired=true", "silent_with_progress": "/S /PreventRebootRequired=true", "install_location": "/InstallDirectoryPath=\"\"" }, "upgrade_behavior": "install", "protocols": [ "mailto", "mid", "webcal", "webcals" ], "file_extensions": [ "eml", "ics", "wdseml" ] } ] }, { "platform": "windows", "version": "140.0", "release_date": "2025-07-02", "release_notes": "What’s New\nnew\nAdded 'Mark as Spam' and 'Mark as Starred' actions to mail notifications\nnew\nAccount Hub enabled by default for second email setup\nWhat’s Changed\nchanged\nSome generic appearance settings were moved from General to Appearance section\nWhat’s Fixed\nfixed\nFolder cache entries were not cleared when an account was removed\nfixed\nSelecting a folder could fail due to an underlying error\nfixed\nThunderbird could crash when copying a local folder to IMAP\nfixed\n\"File > Save As > Template\" and \"Reply With Template\" filter actions failed\nfixed\nView Message Source no longer worked for multiple selected messages\nfixed\nCreating a new mail account from the menu bar in a message window failed\nfixed\nFeed subscriptions were broken\nfixed\nList-ID contents could be selected but not copied via context menu\nfixed\nSome webpage links could be forced to open in Thunderbird\nfixed\nThunderbird could crash when scrolling folders using up/down arrow keys\nfixed\n\"Secret Key ID\" field did not sanitize input, causing draft encryption to fail\nfixed\nCould not send signed/encrypted messages in some setups due to regression\nfixed\nRepaired folders were not reindexed for search after repair\nfixed\nMessages with multiple authors or no author were not indexed for global search\nfixed\nMessages from authors without email address were not indexed for global search\nfixed\nCreating a link from selected text did not work with advanced properties selected\nfixed\nSpellcheck no longer highlighted misspelled words in the compose window\nfixed\nmacOS system notifications worked but email alerts could not be disabled separately\nfixed\nSetting different archiving options for multiple identities did not work\nfixed\nThunderbird could crash in debug build when adding a news account\nfixed\nMoving back in the calendar import dialog could break the Continue button\nfixed\nAdd-ons: Optional permission prompts for WebExtensions displayed wrong permissions\nfixed\nDensity and Font Size menu item buttons used incorrect icons\nfixed\nAuto-unsubscribed dialog was intrusive, reappeared, and could not be ignored\nfixed\nThunderbird could show a misleading error message on IMAP login failure\nfixed\nModal alerts shown for expired articles when downloading news for offline use\nfixed\nStatus bar message did not include newsgroup name along with the account name\nfixed\nReconnecting to an NNTP server was potentially not possible\nfixed\n\"About\" dialog incorrectly displayed \"Daily\" rather than \"Beta\"\nfixed\nLinks in calendar event description were unreadable in dark mode\nfixed\nClicking a 'mid:' link in event created from message did not work\nfixed\nUnable to subscribe to more than one network calendar\nfixed\nVisual and UX improvements\nfixed\nSecurity fixes\nKnown Issues\nunresolved\nPasswords are not remembered in 32-bit MAPI use without a compose window", "release_notes_url": "https://www.thunderbird.net/thunderbird/140.0/releasenotes/", "manifest_version": "1.10.0", "manifest_dir": "manifests/m/Mozilla/Thunderbird/140.0", "installers": [ { "platform": "windows", "architecture": "x86", "type": "nullsoft", "scope": "machine", "url": "https://download-installer.cdn.mozilla.net/pub/thunderbird/releases/140.0/win32/en-US/Thunderbird%20Setup%20140.0.exe", "host": "download-installer.cdn.mozilla.net", "filename": "Thunderbird Setup 140.0.exe", "sha256": "29aa488e2ee95579259f29670cd2c04b9cb97d725780a71402d23c129ebce0a1", "product_code": "Mozilla Thunderbird 140.0 (x86 en-US)", "install_modes": [ "interactive", "silent" ], "switches": { "silent": "/S /PreventRebootRequired=true", "silent_with_progress": "/S /PreventRebootRequired=true", "install_location": "/InstallDirectoryPath=\"\"" }, "upgrade_behavior": "install", "protocols": [ "mailto", "mid", "webcal", "webcals" ], "file_extensions": [ "eml", "ics", "wdseml" ] }, { "platform": "windows", "architecture": "x64", "type": "nullsoft", "scope": "machine", "url": "https://download-installer.cdn.mozilla.net/pub/thunderbird/releases/140.0/win64/en-US/Thunderbird%20Setup%20140.0.exe", "host": "download-installer.cdn.mozilla.net", "filename": "Thunderbird Setup 140.0.exe", "sha256": "9f8ea7a9d67a822654b46cfa07e5972116f6fc7482bcb9729b15e43f59f9d24d", "product_code": "Mozilla Thunderbird 140.0 (x64 en-US)", "install_modes": [ "interactive", "silent" ], "switches": { "silent": "/S /PreventRebootRequired=true", "silent_with_progress": "/S /PreventRebootRequired=true", "install_location": "/InstallDirectoryPath=\"\"" }, "upgrade_behavior": "install", "protocols": [ "mailto", "mid", "webcal", "webcals" ], "file_extensions": [ "eml", "ics", "wdseml" ] } ] }, { "platform": "windows", "version": "139.0.2", "release_date": "2025-06-10", "release_notes": "What’s Fixed\nfixed\nSecurity fixes", "release_notes_url": "https://www.thunderbird.net/thunderbird/139.0.2/releasenotes/", "manifest_version": "1.10.0", "manifest_dir": "manifests/m/Mozilla/Thunderbird/139.0.2", "installers": [ { "platform": "windows", "architecture": "x86", "type": "nullsoft", "scope": "machine", "url": "https://download-installer.cdn.mozilla.net/pub/thunderbird/releases/139.0.2/win32/en-US/Thunderbird%20Setup%20139.0.2.exe", "host": "download-installer.cdn.mozilla.net", "filename": "Thunderbird Setup 139.0.2.exe", "sha256": "39b1b2eded08170e4afb0df90f351fa0c474d1a11935f5165221734d9567cc42", "product_code": "Mozilla Thunderbird 139.0.2 (x86 en-US)", "install_modes": [ "interactive", "silent" ], "switches": { "silent": "/S /PreventRebootRequired=true", "silent_with_progress": "/S /PreventRebootRequired=true", "install_location": "/InstallDirectoryPath=\"\"" }, "upgrade_behavior": "install", "protocols": [ "mailto", "mid", "webcal", "webcals" ], "file_extensions": [ "eml", "ics", "wdseml" ] }, { "platform": "windows", "architecture": "x64", "type": "nullsoft", "scope": "machine", "url": "https://download-installer.cdn.mozilla.net/pub/thunderbird/releases/139.0.2/win64/en-US/Thunderbird%20Setup%20139.0.2.exe", "host": "download-installer.cdn.mozilla.net", "filename": "Thunderbird Setup 139.0.2.exe", "sha256": "bccb367c2b77ae7f5bd519d4cb7538cab53b55c1ff01d7b8d6a5833f6d1b5870", "product_code": "Mozilla Thunderbird 139.0.2 (x64 en-US)", "install_modes": [ "interactive", "silent" ], "switches": { "silent": "/S /PreventRebootRequired=true", "silent_with_progress": "/S /PreventRebootRequired=true", "install_location": "/InstallDirectoryPath=\"\"" }, "upgrade_behavior": "install", "protocols": [ "mailto", "mid", "webcal", "webcals" ], "file_extensions": [ "eml", "ics", "wdseml" ] } ] }, { "platform": "windows", "version": "139.0.1", "release_date": "2025-06-02", "release_notes": "What’s Fixed\nfixed\nThunderbird could crash when copying a local folder to IMAP\nfixed\nUpgrade to 139.0 incorrectly switched Table View to Cards View", "release_notes_url": "https://www.thunderbird.net/thunderbird/139.0.1/releasenotes/", "manifest_version": "1.10.0", "manifest_dir": "manifests/m/Mozilla/Thunderbird/139.0.1", "installers": [ { "platform": "windows", "architecture": "x86", "type": "nullsoft", "scope": "machine", "url": "https://download-installer.cdn.mozilla.net/pub/thunderbird/releases/139.0.1/win32/en-US/Thunderbird%20Setup%20139.0.1.exe", "host": "download-installer.cdn.mozilla.net", "filename": "Thunderbird Setup 139.0.1.exe", "sha256": "f8593e6cf3b8b0c35e9f2352b697f8bffadf3fb10ae2acdc74e9aa01a3bdd12d", "product_code": "Mozilla Thunderbird 139.0.1 (x86 en-US)", "install_modes": [ "interactive", "silent" ], "switches": { "silent": "/S /PreventRebootRequired=true", "silent_with_progress": "/S /PreventRebootRequired=true", "install_location": "/InstallDirectoryPath=\"\"" }, "upgrade_behavior": "install", "protocols": [ "mailto", "mid", "webcal", "webcals" ], "file_extensions": [ "eml", "ics", "wdseml" ] }, { "platform": "windows", "architecture": "x64", "type": "nullsoft", "scope": "machine", "url": "https://download-installer.cdn.mozilla.net/pub/thunderbird/releases/139.0.1/win64/en-US/Thunderbird%20Setup%20139.0.1.exe", "host": "download-installer.cdn.mozilla.net", "filename": "Thunderbird Setup 139.0.1.exe", "sha256": "241161cf5110be1c2adf6c759c1d900fb33c3fe952b55b89d5ab1ff7fc12e28c", "product_code": "Mozilla Thunderbird 139.0.1 (x64 en-US)", "install_modes": [ "interactive", "silent" ], "switches": { "silent": "/S /PreventRebootRequired=true", "silent_with_progress": "/S /PreventRebootRequired=true", "install_location": "/InstallDirectoryPath=\"\"" }, "upgrade_behavior": "install", "protocols": [ "mailto", "mid", "webcal", "webcals" ], "file_extensions": [ "eml", "ics", "wdseml" ] } ] }, { "platform": "windows", "version": "139.0", "release_date": "2025-05-27", "release_notes": "What’s New\nnew\nImplemented enterprise policy to allow granular in-app notification control\nnew\nAdded 'Mark as Read' and 'Delete' actions to mail notifications\nnew\nImplemented customizable row count for Cards View in 'Appearance' settings\nnew\nImplemented ability to manually sort folders in the folder pane\nWhat’s Fixed\nfixed\nThunderbird could crash when setting message compose headers\nfixed\nLinks in the OAuth authentication window did not open when clicked\nfixed\nAccess was not allowed to attachments at specific UNC hosts\nfixed\nMail window could stop functioning during and after folder compaction\nfixed\nFull folder sorting logic was not used when inserting folders after move\nfixed\nmail.compose.other.header headers were not shown in Show All Headers mode\nfixed\nFolder was hidden from Favorite when a subfolder was removed\nfixed\nFolder tree message counts displayed incorrectly under certain conditions\nfixed\nSelection was not restored after manual folder sorting\nfixed\nDragging a folder to a new parent did not insert it correctly for IMAP folders\nfixed\nCompact View users had all folders expanded after restart\nfixed\nInvite attachments without a name were forwarded as 'Attached Message Part'\nfixed\nChat settings tab remained visible when mail.chat.enabled was false\nfixed\nSelected folder was not refreshed when applying 'Appearance' Threading settings\nfixed\n'Grouped by Sort' for all folders in 'Appearance' settings did not work properly\nfixed\nThunderbird could crash if message copying to Sent folder was interrupted\nfixed\nSystem search toggle did not properly reflect and control integration state\nfixed\nDragging attachments to desktop from Thunderbird did not work on macOS\nfixed\nDark mode messages displayed in light mode due to preference setting conflict\nfixed\nCancelling a post to a news server could fail and remove the article\nfixed\nThunderbird could crash in NNTP subscription dialog\nfixed\nNewsgroup searches with slashes were not supported with XPAT-enabled servers\nfixed\nOffline newsgroup use lacked functionality needed for effective offline access\nfixed\nChat accounts could not be deleted\nfixed\nReminders missed for all-day events when calendar.alarms.showmissed was false\nfixed\nAccess to multiple CalDAV calendars was not possible\nfixed\nVisual and UX improvements\nfixed\nSecurity fixes", "release_notes_url": "https://www.thunderbird.net/thunderbird/139.0/releasenotes/", "manifest_version": "1.10.0", "manifest_dir": "manifests/m/Mozilla/Thunderbird/139.0", "installers": [ { "platform": "windows", "architecture": "x86", "type": "nullsoft", "scope": "machine", "url": "https://download-installer.cdn.mozilla.net/pub/thunderbird/releases/139.0/win32/en-US/Thunderbird%20Setup%20139.0.exe", "host": "download-installer.cdn.mozilla.net", "filename": "Thunderbird Setup 139.0.exe", "sha256": "3c640b9b2b60318c536daf478dc673f3a1e1ffe32a61b97aa208d05119db27f7", "product_code": "Mozilla Thunderbird 139.0 (x86 en-US)", "install_modes": [ "interactive", "silent" ], "switches": { "silent": "/S /PreventRebootRequired=true", "silent_with_progress": "/S /PreventRebootRequired=true", "install_location": "/InstallDirectoryPath=\"\"" }, "upgrade_behavior": "install", "protocols": [ "mailto", "mid", "webcal", "webcals" ], "file_extensions": [ "eml", "ics", "wdseml" ] }, { "platform": "windows", "architecture": "x64", "type": "nullsoft", "scope": "machine", "url": "https://download-installer.cdn.mozilla.net/pub/thunderbird/releases/139.0/win64/en-US/Thunderbird%20Setup%20139.0.exe", "host": "download-installer.cdn.mozilla.net", "filename": "Thunderbird Setup 139.0.exe", "sha256": "e93ff0a1feb21ca9817acede1ff783409c224b86407d250ab9dd904850d42f07", "product_code": "Mozilla Thunderbird 139.0 (x64 en-US)", "install_modes": [ "interactive", "silent" ], "switches": { "silent": "/S /PreventRebootRequired=true", "silent_with_progress": "/S /PreventRebootRequired=true", "install_location": "/InstallDirectoryPath=\"\"" }, "upgrade_behavior": "install", "protocols": [ "mailto", "mid", "webcal", "webcals" ], "file_extensions": [ "eml", "ics", "wdseml" ] } ] }, { "platform": "windows", "version": "138.0.2", "release_date": "2025-05-20", "release_notes": "What’s Fixed\nfixed\nMessages could not be viewed if the profile used a UNC path\nfixed\nStandalone message windows/tabs no longer responded after folder compaction\nfixed\nCompacting folders with certain pending operations caused unnecessary warnings\nfixed\nSecurity fixes", "release_notes_url": "https://www.thunderbird.net/thunderbird/138.0.2/releasenotes/", "manifest_version": "1.10.0", "manifest_dir": "manifests/m/Mozilla/Thunderbird/138.0.2", "installers": [ { "platform": "windows", "architecture": "x86", "type": "nullsoft", "scope": "machine", "url": "https://download-installer.cdn.mozilla.net/pub/thunderbird/releases/138.0.2/win32/en-US/Thunderbird%20Setup%20138.0.2.exe", "host": "download-installer.cdn.mozilla.net", "filename": "Thunderbird Setup 138.0.2.exe", "sha256": "6a97b4517b29c20d244fd36e28477ff9cb84894712528dff9d2896ec40fe91c3", "product_code": "Mozilla Thunderbird 138.0.2 (x86 en-US)", "install_modes": [ "interactive", "silent" ], "switches": { "silent": "/S /PreventRebootRequired=true", "silent_with_progress": "/S /PreventRebootRequired=true", "install_location": "/InstallDirectoryPath=\"\"" }, "upgrade_behavior": "install", "protocols": [ "mailto", "mid", "webcal", "webcals" ], "file_extensions": [ "eml", "ics", "wdseml" ] }, { "platform": "windows", "architecture": "x64", "type": "nullsoft", "scope": "machine", "url": "https://download-installer.cdn.mozilla.net/pub/thunderbird/releases/138.0.2/win64/en-US/Thunderbird%20Setup%20138.0.2.exe", "host": "download-installer.cdn.mozilla.net", "filename": "Thunderbird Setup 138.0.2.exe", "sha256": "5146defb0abd0028efd0c8eefe32f70d055988fc7d51e9aa7b8603249a09152c", "product_code": "Mozilla Thunderbird 138.0.2 (x64 en-US)", "install_modes": [ "interactive", "silent" ], "switches": { "silent": "/S /PreventRebootRequired=true", "silent_with_progress": "/S /PreventRebootRequired=true", "install_location": "/InstallDirectoryPath=\"\"" }, "upgrade_behavior": "install", "protocols": [ "mailto", "mid", "webcal", "webcals" ], "file_extensions": [ "eml", "ics", "wdseml" ] } ] }, { "platform": "windows", "version": "138.0.1", "release_date": "2025-05-13", "release_notes_url": "https://www.thunderbird.net/thunderbird/138.0.1/releasenotes/", "manifest_version": "1.10.0", "manifest_dir": "manifests/m/Mozilla/Thunderbird/138.0.1", "installers": [ { "platform": "windows", "architecture": "x86", "type": "nullsoft", "scope": "machine", "url": "https://download-installer.cdn.mozilla.net/pub/thunderbird/releases/138.0.1/win32/en-US/Thunderbird%20Setup%20138.0.1.exe", "host": "download-installer.cdn.mozilla.net", "filename": "Thunderbird Setup 138.0.1.exe", "sha256": "8aef43622e271e077f5898cc6b2b7f4371141be23722c309cf4781e1dbb00c25", "product_code": "Mozilla Thunderbird 138.0.1 (x86 en-US)", 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"/InstallDirectoryPath=\"\"" }, "upgrade_behavior": "install", "protocols": [ "mailto", "mid", "webcal", "webcals" ], "file_extensions": [ "eml", "ics", "wdseml" ] } ] }, { "platform": "windows", "version": "138.0", "release_date": "2025-04-29", "release_notes": "What’s New\nnew\nNew mail alert now includes message disposition buttons\nnew\nNew mail notification customization added to macOS Settings\nWhat’s Changed\nchanged\nChanged color override defaults with high contrast mode on macOS and Linux\nWhat’s Fixed\nfixed\nmacOS notifications displayed two logos\nfixed\nMessage preview truncation in notifications improved\nfixed\nWrong day of week displayed for some emails\nfixed\nIn dark mode with light theme, message reader still displayed in dark mode\nfixed\nMessage link and text colors were incorrect when using Dark Reader\nfixed\nUnchecking \"Show all headers\" in Message Header Settings closed dialog\nfixed\nAddress book did not match users when case differed in some instances\nfixed\nMenu items to manage folders were not disabled in offline mode\nfixed\nUsing Delete column in \"Search Messages...\" window could delete other messages\nfixed\nCtrl or Shift selecting multiple messages reset when dragging across a message\nfixed\nNewsgroups could no longer be re-ordered in the folder tree via drag and drop\nfixed\nWindows users with non-ASCII folder names and profile paths could not view emails\nfixed\nOpenPGP key was not updated when accepted key was reimported with new identities\nfixed\nDual signed (PGP and S/MIME) emails were not displayed\nfixed\nNotification duration preference enabled when system notifications were enabled\nfixed\nThunderbird could crash when adaptive message filtering was enabled\nfixed\nCardDAV synchronization to Zimbra server failed\nfixed\nKeyboard navigation was not possible when first header button was disabled\nfixed\nFolders missing from view when \"Show only subscribed folders\" was not selected\nfixed\nNickserv messages appeared during successful authentication\nfixed\nGlobal indexing failed when processing email with invalid calendar data\nfixed\nClicking a mid: link in Calendar opened two copies of the message\nfixed\nSome calendar requests were blocked due to opaque response blocking\nfixed\nVisual and UX improvements\nfixed\nSecurity fixes", "release_notes_url": "https://www.thunderbird.net/thunderbird/138.0/releasenotes/", "manifest_version": "1.10.0", "manifest_dir": "manifests/m/Mozilla/Thunderbird/138.0", "installers": [ { "platform": "windows", "architecture": "x86", "type": "nullsoft", "scope": "machine", "url": "https://download-installer.cdn.mozilla.net/pub/thunderbird/releases/138.0/win32/en-US/Thunderbird%20Setup%20138.0.exe", "host": "download-installer.cdn.mozilla.net", "filename": "Thunderbird Setup 138.0.exe", "sha256": "cc9fe185ed4dedfffdb41acadecf7d4417fb90d97551c1b049cc71bf1680777f", "product_code": "Mozilla Thunderbird 138.0 (x86 en-US)", "install_modes": [ 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"upgrade_behavior": "install", "protocols": [ "mailto", "mid", "webcal", "webcals" ], "file_extensions": [ "eml", "ics", "wdseml" ] } ] }, { "platform": "windows", "version": "137.0.2", "release_date": "2025-04-15", "release_notes": "What’s Fixed\nfixed\nThunderbird could crash on startup when creating Linux system tray icon\nfixed\nSecurity fixes", "release_notes_url": "https://www.thunderbird.net/thunderbird/137.0.2/releasenotes/", "manifest_version": "1.10.0", "manifest_dir": "manifests/m/Mozilla/Thunderbird/137.0.2", "installers": [ { "platform": "windows", "architecture": "x86", "type": "nullsoft", "scope": "machine", "url": "https://download-installer.cdn.mozilla.net/pub/thunderbird/releases/137.0.2/win32/en-US/Thunderbird%20Setup%20137.0.2.exe", "host": "download-installer.cdn.mozilla.net", "filename": "Thunderbird Setup 137.0.2.exe", "sha256": "94b8a193575c55c494a08272d71a7f3d29bbca798dd0986e638f8d2f1962a7bf", "product_code": "Mozilla Thunderbird 137.0.2 (x86 en-US)", "install_modes": [ "interactive", "silent" ], "switches": { "silent": "/S /PreventRebootRequired=true", "silent_with_progress": "/S /PreventRebootRequired=true", "install_location": "/InstallDirectoryPath=\"\"" }, "upgrade_behavior": "install", "protocols": [ "mailto", "mid", "webcal", "webcals" ], "file_extensions": [ "eml", "ics", "wdseml" ] }, { "platform": "windows", "architecture": "x64", "type": "nullsoft", "scope": "machine", "url": "https://download-installer.cdn.mozilla.net/pub/thunderbird/releases/137.0.2/win64/en-US/Thunderbird%20Setup%20137.0.2.exe", "host": "download-installer.cdn.mozilla.net", "filename": "Thunderbird Setup 137.0.2.exe", "sha256": "705d03584cbf0271c8cae9a05da76d96fded6e9fb5dfbf40f6b4218681944b24", "product_code": "Mozilla Thunderbird 137.0.2 (x64 en-US)", "install_modes": [ "interactive", "silent" ], "switches": { "silent": "/S /PreventRebootRequired=true", "silent_with_progress": "/S /PreventRebootRequired=true", "install_location": 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"file_extensions": [ "eml", "ics", "wdseml" ] } ] }, { "platform": "windows", "version": "137.0", "release_date": "2025-04-01", "release_notes": "What’s Changed\nchanged\nFile names are now used when storing mail folders (Windows only).\nchanged\nDisable Linux system tray icon until it gains functionality\nWhat’s Fixed\nfixed\nIn-app notifications did not display correctly in high contrast mode.\nfixed\nRepair folder did not fix mbox files produced on MacOS before Thunderbird 1.0.\nfixed\nEdit menu entries missing when group header selected in \"Grouped by sort\" view.\nfixed\nIMAP folder \"Undelete\" performed \"Delete\" when mixed messages were selected.\nfixed\nIn RSS feeds, the space bar did not scroll the message like it did in emails.\nfixed\nSlow performance opening an .eml file in a profile with many folders.\nfixed\nThreaded search view was not updated correctly when sorted by date received.\nfixed\nLine spacing changed unexpectedly in the message list with the default font size.\nfixed\nSaved message list selection was discarded when user made a new selection.\nfixed\nReplying from local or unified folders failed when the message pane was hidden.\nfixed\nMessage security panel strings were used in the wrong places.\nfixed\nImporting an OpenPGP public key with whitespace failed.\nfixed\nUnable to open attached signed OpenPGP .eml message.\nfixed\nRight-clicking \"Decrypt and Save As...\" on an attachment file failed.\nfixed\nSearching during shutdown could cause crash.\nfixed\nFailed news message sending could close the compose window unexpectedly.\nfixed\nHaving a corrupt address book database prevented sending mail.\nfixed\nForwarding messages as attachments could use the wrong MIME type.\nfixed\nTwo-factor auth via text or email did not work with Office 365 using Oauth2.\nfixed\nAccount settings menu could be loaded twice.\nfixed\nNo gap existed between Back and Forward buttons in the Feed Account Wizard dialog.\nfixed\nThunderbird could crash when importing mail\nfixed\nUnable to auto-discover Address Book on Radicale server.\nfixed\nMark-Of-The-Web was not applied to attachments saved via drag and drop.\nfixed\nSome messages could not be scrolled due to hidden overflows in inline styles.\nfixed\nClicking a 'mid:' link could clear the thread pane and cause errors.\nfixed\nPerformance regressed when moving/copying messages on Windows.\nfixed\nAutomatic compact did not attempt to compact all folders when error encountered.\nfixed\nSlow performance when moving bulk messages from IMAP to local.\nfixed\nCrossposting news article was not possible if newsgroups on different servers.\nfixed\nIRC channel was not visible after restart.\nfixed\nUnable to view full certificate chain from the \"View Signature\" button.\nfixed\nVisual and UX improvements\nfixed\nSecurity fixes", "release_notes_url": "https://www.thunderbird.net/thunderbird/137.0/releasenotes/", "manifest_version": "1.9.0", "manifest_dir": "manifests/m/Mozilla/Thunderbird/137.0", "installers": [ { "platform": "windows", "architecture": "x86", "type": "nullsoft", "scope": "machine", "url": "https://download-installer.cdn.mozilla.net/pub/thunderbird/releases/137.0/win32/en-US/Thunderbird%20Setup%20137.0.exe", "host": "download-installer.cdn.mozilla.net", "filename": "Thunderbird Setup 137.0.exe", "sha256": "9d3a44e157c9f9f0a98b8224bdf9f0845392e7ab5fbb5a7d696c6cacc9716c2c", "product_code": "Mozilla Thunderbird 137.0 (x86 en-US)", "install_modes": [ "interactive", "silent" ], "switches": { "silent": "/S /PreventRebootRequired=true", "silent_with_progress": "/S /PreventRebootRequired=true", "install_location": "/InstallDirectoryPath=\"\"" }, "upgrade_behavior": "install", "protocols": [ "mailto", "mid", "webcal", "webcals" ], "file_extensions": [ "eml", "ics", "wdseml" ] }, { "platform": "windows", "architecture": "x64", "type": "nullsoft", "scope": "machine", "url": 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Not independently re-computed; signatures not checked.", "checks": { "hash_in_manifest": true, "hash_recomputed": false, "signature_checked": false } }, "provenance": [ { "source": "winget-pkgs", "platform": "windows", "repo": "https://github.com/microsoft/winget-pkgs", "commit": "21e6be824c55b3c6f476664adc0b93087cd16c82", "retrieved_at": "2026-11-04T01:08:06.172Z", "path": "manifests/m/Mozilla/Thunderbird" }, { "source": "homebrew-cask", "platform": "macos", "repo": "https://github.com/Homebrew/homebrew-cask", "commit": "1f44ba636b3c070723431b7ab5848c15eb34396a", "retrieved_at": "2026-11-04T01:08:06.172Z", "path": "Casks/t/thunderbird.rb", "api_url": "https://formulae.brew.sh/api/cask/thunderbird.json" } ], "derived": { "canonical_url": "https://everyversion.net/thunderbird/", "title": "Download Mozilla Thunderbird (en-US) and old versions", "h1": "Download Mozilla Thunderbird (en-US)", "installer_summary": { "windows": [ "Delivered as an NSIS (Nullsoft) setup program (.exe) for x64 and x86.", "Installs for all users on the PC, which normally requires administrator rights.", "Supports unattended install with `/S /PreventRebootRequired=true`.", "Declared install modes: interactive and silent.", "Registers the `mailto://`, `mid://`, `webcal://`, and `webcals://` link protocol.", "Associates with the file types `.eml`, `.ics`, and `.wdseml`.", "Upgrades install over the existing version." ], "macos": [ "Delivered as a disk image (.dmg) for Apple silicon and Intel.", "Installs the app `Thunderbird.app` into the Applications folder.", "The app updates itself, so it may be newer than the version Homebrew lists.", "On uninstall, Homebrew asks the app to quit.", "A full “zap” removal also deletes up to 8 support, cache and preference locations in your home folder." ] } } }