| Version | Change log |
| Betterbird 140.8.0esr-b Feb 22, 2026 |
Fixed in this version: CHANGED - The Activity Manager now uses a grey icon when no messages were downloaded FIXED - Problems with "after sending" filters on IMAP folders under certain circumstances - Bug 2008314 Features and fixes exclusive to Betterbird (new in the 140 series): NEW - Primary password and mail password prompts now have a button to reveal the password (140.7.0) MITIGATED - Problems with "after sending" filters on IMAP folders under certain circumstances (140.7.0) - Bug 2008314 FIXED - Archive folder didn't have the correct icon under some circumstances (140.7.0) FIXED - Empty sub-menu of Recent Destinations and Favourites (140.7.0) - Bug 2008314 NEW - Dark reader switch for the compose window (140.6.0-bb16) NEW - Preference calendar.itip.eventDescriptionAsEmailBody to add event description to invitation e-mail body (140.6.0-bb16) - Bug 19016781 NEW - Address book Categories, working for local address books and CardDAV address books supporting vCard 4.0 (140.6.0-bb16) - Bug 75711 Bug 1764184 and 15 more duplicates CHANGED - The "Recent Destinations" folder list now has a short MRU list above, and a longer alphabetical list below. This also applies to the filter editor. (140.6.0-bb16) - Bug 2000453 CHANGED - Re: prefix now maintained when a reply is dragged to the compose window as message attachment (140.6.0-bb16) FIXED - Erroneous parsing of command line arguments that contained commas, commas in filenames in the attachment parameter need to be escaped by a backslash, example: -compose "attachment='C:UsersBB-loverfile,part.txt'" (140.6.0-bb16) - Bug 900117 FIXED - "Caret confusion", use of preference editor.white_space_normalization.blink_compatible no longer necessary (140.6.0-bb16) - Bug 2005895 Bug 2007618 FIXED - Embedded SVG images sometimes not displayed correctly (140.6.0-bb16) - Bug 1936022 Bug 2005871 FIXED - Potential issue when displaying PGP messages while the Global Search and Indexer is |
| Betterbird 140.7.1esr-b Jan 24, 2026 |
Fixed in this version: CHANGED - The Activity Manager now uses a grey icon when no messages were downloaded FIXED - Problems with "after sending" filters on IMAP folders under certain circumstances - Bug 2008314 Features and fixes exclusive to Betterbird (new in the 140 series): NEW - Primary password and mail password prompts now have a button to reveal the password (140.7.0) MITIGATED - Problems with "after sending" filters on IMAP folders under certain circumstances (140.7.0) - Bug 2008314 FIXED - Archive folder didn't have the correct icon under some circumstances (140.7.0) FIXED - Empty sub-menu of Recent Destinations and Favourites (140.7.0) - Bug 2008314 NEW - Dark reader switch for the compose window (140.6.0-bb16) NEW - Preference calendar.itip.eventDescriptionAsEmailBody to add event description to invitation e-mail body (140.6.0-bb16) - Bug 19016781 NEW - Address book Categories, working for local address books and CardDAV address books supporting vCard 4.0 (140.6.0-bb16) - Bug 75711 Bug 1764184 and 15 more duplicates CHANGED - The "Recent Destinations" folder list now has a short MRU list above, and a longer alphabetical list below. This also applies to the filter editor. (140.6.0-bb16) - Bug 2000453 CHANGED - Re: prefix now maintained when a reply is dragged to the compose window as message attachment (140.6.0-bb16) FIXED - Erroneous parsing of command line arguments that contained commas, commas in filenames in the attachment parameter need to be escaped by a backslash, example: -compose "attachment='C:UsersBB-loverfile,part.txt'" (140.6.0-bb16) - Bug 900117 FIXED - "Caret confusion", use of preference editor.white_space_normalization.blink_compatible no longer necessary (140.6.0-bb16) - Bug 2005895 Bug 2007618 FIXED - Embedded SVG images sometimes not displayed correctly (140.6.0-bb16) - Bug 1936022 Bug 2005871 FIXED - Potential issue when displaying PGP messages while the Global Search and Indexer is |
| Betterbird 140.7.0esr-b Jan 12, 2026 |
Fixed in this version: NEW - Primary password and mail password prompts now have a button to reveal the password MITIGATED - Problems with "after sending" filters on IMAP folders under certain circumstances - Bug 2008314 FIXED - Archive folder didn't have the correct icon under some circumstances FIXED - Empty sub-menu of Recent Destinations and Favourites - Bug 2008314 Features and fixes exclusive to Betterbird (new in the 140 series): NEW - Dark reader switch for the compose window (140.6.0-bb16) NEW - Preference calendar.itip.eventDescriptionAsEmailBody to add event description to invitation e-mail body (140.6.0-bb16) - Bug 19016781 NEW - Address book Categories, working for local address books and CardDAV address books supporting vCard 4.0 (140.6.0-bb16) - Bug 75711 Bug 1764184 and 15 more duplicates CHANGED - The "Recent Destinations" folder list now has a short MRU list above, and a longer alphabetical list below. This also applies to the filter editor. (140.6.0-bb16) - Bug 2000453 CHANGED - Re: prefix now maintained when a reply is dragged to the compose window as message attachment (140.6.0-bb16) FIXED - Erroneous parsing of command line arguments that contained commas, commas in filenames in the attachment parameter need to be escaped by a backslash, example: -compose "attachment='C:UsersBB-loverfile,part.txt'" (140.6.0-bb16) - Bug 900117 FIXED - "Caret confusion", use of preference editor.white_space_normalization.blink_compatible no longer necessary (140.6.0-bb16) - Bug 2005895 Bug 2007618 FIXED - Embedded SVG images sometimes not displayed correctly (140.6.0-bb16) - Bug 1936022 Bug 2005871 FIXED - Potential issue when displaying PGP messages while the Global Search and Indexer is enabled. Potential regression from fix for indexing S/MIME-encrypted messages in 140.6.0. (140.6.0-bb16) FIXED - Some menu popups not showing checkmarks, especially on the address book list display options (140.6.0-bb16) FIXED - French loc |
| Betterbird 140.6.0esr-b Jan 2, 2026 |
NEW - Dark reader switch for the compose window NEW - Preference calendar.itip.eventDescriptionAsEmailBody to add event description to invitation e-mail body - Bug 19016781 NEW - Address book Categories, working for local address books and CardDAV address books supporting vCard 4.0 - Bug 75711 Bug 1764184 and 15 more duplicates CHANGED - The "Recent Destinations" folder list now has a short MRU list above, and a longer alphabetical list below. This also applies to the filter editor. - Bug 2000453 CHANGED - Re: prefix now maintained when a reply is dragged to the compose window as message attachment FIXED - Erroneous parsing of command line arguments that contained commas, commas in filenames in the attachment parameter need to be escaped by a backslash, example: -compose "attachment='C:UsersBB-loverfile,part.txt'" - Bug 900117 FIXED - "Caret confusion", use of preference editor.white_space_normalization.blink_compatible no longer necessary - Bug 2005895 Bug 2007618 FIXED - Embedded SVG images sometimes not displayed correctly - Bug 1936022 Bug 2005871 FIXED - Potential issue when displaying PGP messages while the Global Search and Indexer is enabled. Potential regression from fix for indexing S/MIME-encrypted messages in 140.6.0. FIXED - Some menu popups not showing checkmarks, especially on the address book list display options FIXED - French localisation had missing strings - Bug 200741022 |
| Betterbird 140.5.0esr-b Nov 8, 2025 |
Fixed in this version: NEW - Preference mail.imap.allow_unsubscribe_noselect allows unsubscribing from NOSELECT IMAP folders. This is useful for Protom Mail Bridge users who with to remove unneeded folders Labels and Folders from the folder pane. - GitHub #497 CHANGED - The "Recent Destinations" folder list shows folders again into which messages were recently moved. The Filter Editor still uses recently used folders. FIXED - Placement of Betterbird-native new mail alert on wrong monitor. Preference mail.notification.show_on_app_screen not working correctly in some cases. FIXED - Reinstated preference mail.folderpane.sumSubfolders - Bug 1852171 FIXED - Calendar scroll issue - Bug 1976182 Features and fixes exclusive to Betterbird (new in the 140 series): CHANGED - The tooltip of the folder name in the message list header and the folder pane now shows the full folder path (140.4.0) - Bug 382977 CHANGED - File name sanitation has been unified for all platforms: /:*? are replaced with underscore, " and < > are also replaced. (140.4.0) FIXED - "Open Link in Browser" in the compose window caused an unnecessary prompt. For non-http(s) URLs, preference mail.external_protocol_requires_permission is now honoured. (140.4.0) FIXED - Issue in WebExtension API setQuickFilter() leading to incompatibility with add-on "quickfilter-kbd" (140.4.0) FIXED - Issue when detaching attachment (140.4.0) - GitHub #489 NEW - Mark button on the unified toolbar now has the junk options also present on the context menu in the message list (140.3.1) CHANGED - Catch-all processing now also applied to forwarding of a message (inline or one message as attachment) and to "reply to self" (140.3.1) CHANGED - The recent folder list now shows most recently used (visited or modified) folders (MRU), not most recently modified folders (MRM) (140.3.1) FIXED - Mitigate random flashing of Betterbird-native new mail alert in top left corner of screen. If you ha |
| Betterbird 140.4.0esr-b Oct 12, 2025 |
Fixed in this version: CHANGED - The tooltip of the folder name in the message list header and the folder pane now shows the full folder path - Bug 382977 CHANGED - File name sanitation has been unified for all platforms: /:*? are replaced with underscore, "and < > are also replaced. FIXED - "Open Link in Browser" in the compose window caused an unnecessary prompt. For non-http(s) URLs, preference mail.external_protocol_requires_permission is now honoured. (For Windows and Linux only, will ship for Mac in the next release.) FIXED - Issue in WebExtension API setQuickFilter() leading to incompatibility with add-on "quickfilter-kbd" FIXED - Issue when detaching attachment - GitHub #489 FIXED - Placement of Betterbird-native new mail alert on wrong monitor |
| Betterbird 128.12.0esr- Jun 30, 2025 |
Fixed in this version: For details in the following feed reader improvements, also note this section. NEW - Support JSON feeds - Bug 1678721 NEW - Optionally store updated articles for Atom and JSON feeds - Bug 270275 Bug 1871741 Bug 1939390 NEW - Optionally store of the feed article web page with the message, preference rss.show.feed-webpage-archive controls the display: 0: archive not used, 1 (default): archive used when offline or no network, 2: archive always used - Bug 308436 NEW - Horizontal view for users with vertical screen setup - Bug 1964119 NEW - Header pane button to easily show message headers, configurable via preference mail.messageEditor.showCustomHeaders. See this paragraph for details. NEW - Allow filters to run on non-inbox IMAP folders that receive new messages on the server - Bug 294632 CHANGED - The Spanish localisation now uses the es-ES locale FIXED - Binaries weren't signed with a time stamp which led to problems in Windows 11. Refer to this section for details. FIXED - Getting Involved link in About box not working FIXED - Spellcheck no longer highlighted the misspelled word in the compose window - Bug 1971121 FIXED - Link underlying with preference layout.css.always_underline_links not working - Bug 1970689 FIXED - Messages moved from POP Inbox via filter remain in Inbox and reappear after Repair. Compact not always removes them. (New fix in 140 series) - Bug 1890253 FIXED - Folders which were manually sorted/reordered in BB 128 will maintain the order in BB 140 Various minor fixes that Thunderbird isn't shipping yet: Bug 617287 Bug 1947026 Bug 1962868 Bug 1968820 Bug 1971542 Bug 1971603 Bug 1973294 Note that we're just starting to gain experience with the new 140 series, so please do not use this version in production yet. |
| Betterbird 128.11.1esr- Jun 9, 2025 |
Based on Thunderbird 128.11.1esr. Fixed in this version: FIXED: Thunderbird had to adjust their UNC processing once again, this only affects Windows users |
| Betterbird 128.11.0esr- May 27, 2025 | FIXED: Windows: Access to local folders via UNC paths (already shipped in 128.10.1-bb27 "latest build") |
| Betterbird 128.10.1esr- May 14, 2025 |
Fixed in this version: CHANGED - Improved feedback during Quick Folder Search: First search hits are shown immediately in message list FIXED - One tab was shown after restart although the option to auto hide the tab bar was selected FIXED - Blank thread pane after "Repair folder" (broken since 128.6.0) |
