Betterbird: Release Notes (Previous Releases)

91.13.1-bb37 (13 September 2022)

Based on Thunderbird 91.13.1, release notes.

Fixed in this version:

This is the last version in the 91 series.
NEW - Thunderbird language packs which are incompatible with Betterbird can no longer be installed
FIXED - Compositions using "fixed width" text at a non-default size erroneously downgraded to plain text - Bug 1786162
FIXED - Various bugs that could lead to the mass deletion of Message Summary Files (MSF) - Bug 1773822 - Bug 1788901 - Bug 1787609
FIXED - Fix drag of image from MyPhoneExplorer (MPE) to compose window - Bug 1790291

Still only fixed in Betterbird 91, will ship in TB 102 in June/July 2022:

FIXED - New mail alert only shown for one account even when multiple accounts received new mail - Bug 1776580
FIXED - Saving the message source didn't work - Bug 1759911
FIXED - Display of symbol fonts (Webdings, Wingdings, etc.) didn't work - Bug 1756720 - Bug 1757897
FIXED - News folders which weren't open didn't receive unread message notification (highlight colour, yellow biff symbol) - Bug 1751160
FIXED - Ctrl+scroll wheel zoom did not work in message source window - Bug 1655244
FIXED - Issue with MS teams invitation in Google Calendar - Bug 1727061
FIXED - Saving a draft failed to delete temporary files under some circumstances - Bug 1751461
FIXED - Alerts in Activity Manager were missing timestamp - Bug 1717307
NEW - Re-established Enigmail's "decrypt to folder" - Bug 1693332
FIXED - Detached attachments weren't opened from original location but from temp instead (causing potential lost changes) - Bug 1761973
FIXED - Empty trash on exit not reliable, especially for flaky servers like Yahoo - Bug 1745205
FIXED - Issues with folder subscription on servers using OAuth2 (Yahoo, etc.) - Bug 1759883
FIXED - Couldn't drag link to new composition - Bug 1732903
FIXED - Couldn't drag image from message to new composition - Bug 1753331
FIXED - All day events allowed time entry - Bug 1744442

Features and fixes exclusive to Betterbird:

NEW - Multi-line view. View > Layout > Multi-line View On All Folders or per folder in the column picker
NEW - Header pane button customise restored - Bug 1556261
NEW - Search terms now allow for complex expressions by adding a group feature - Bug 297852
NEW - Quick Filter untagged messages - Bug 683809
FIXED - Global search in encrypted messages (needs to be enabled in preferences) - Bug 188988
NEW - Regular folder search and Quick Filter in encrypted messages - Bug 1562737
CHANGED - Windows systray tooltip now showing list folders with new messages - Bug 1721063
NEW - Context menu in a news message now includes "Open Message For ID" (message pane only, not in message in tab)
FIXED - New posts in ignored threads caused "phantom" unread messages. "Mark > Thread As Read" will fix corruption - Bug 799040
NEW - Preferences mail.addressDisplayAuthor and mail.addressDisplayRecipients (1 = name, 2 = e-mail, 3 = both) for message list display - Bug 697031
NEW - Showing file URL for detached attachments, correct size and strike-through for deleted files - Bug 1740956, Bug 1741093
NEW - Folder context menu now offers to set folder as startup folder (instead of last visited)
NEW - Add Recent menu to allow attaching recently used files (Windows only) - Bug 1560737
FIXED - Issues when dragging Windows shell link (.lnk) or folder to Write (compose) window - Bug 276869, Bug 524874
CHANGED - Activity manager opens in tab
FIXED - Attachments saved via double-click didn't get listed in the list of saved files (Ctrl+J) - Bug 1744709
FIXED - Copying NBSP replaced NBSP with regular space - Bug 359303
NEW - Ctrl+Shift+Space inserts NBSP now, also mostly fixes "automatic" unwanted NBSP replacement - Bug 532712
FIXED - Inserting links with spaces gave random erroneous results - Bug 1563452
FIXED - Repair Text Encoding didn't repair the subject - Bug 1739609

Not mentioned in the front page feature table:
NEW - Preference mail.openpgp.ignore_missing_mdc to allow display of attachments with missing MDC - Bug 1729221
NEW - Added preference mail.biff.show_for_server to optionally suppress biff notifications for server root folders.
FIXED - Subject change with "new subject (was: old subject)" didn't work - Bug 1680425
CHANGED - HTML-only messages will no longer be sent to plain text recipients - Bug 1727493, comment #31
FIXED - Feed reader didn't tolerate any XML errors; now it will try fetching the feed as HTML as a fallback - Bug 1746749
FIXED - Moving multiple IMAP folders didn't work - Bug 589008
FIXED - Copying an embedded image didn't work under certain circumstances - Bug 1760365
FIXED - .startup-incomplete not deleted from profile - Bug 1762043
FIXED - Status text sometimes displayed "null" - Bug 1766578
FIXED - Various problems when saving the compose window as file - Bug 1676825
FIXED - ... and a few more: Comma in detached file name (Bug 350825), Charset forward detection (Bug 1737245), Charset detection (Bug 1746695)

91.13.0-bb36 (22 August 2022)

Based on Thunderbird 91.13.0, release notes.

Fixed in this version:

No changes. This is the last version in the 91 series.

Still only fixed in Betterbird 91, will ship in TB 102 in June/July 2022:

Features and fixes exclusive to Betterbird:

91.12.0-bb35 (24 July 2022)

Based on Thunderbird 91.12.0, release notes.

Fixed in this version:

NEW - By popular demand, the multi-line view now also supports threading
CHANGED - Better styling for summary lines in "grouped by" multi-line views
CHANGED - The portable launcher now allows moving the portable "installation", to facilitate, set pref extensions.startupScanScopes to 5 (or 7 when using light weight themes)

Still only fixed in Betterbird 91, will ship in TB 102 in June/July 2022:

Features and fixes exclusive to Betterbird:

91.11.0-bb34 (25 June 2022)

Based on Thunderbird 91.11.0, release notes.

Fixed in this version:

FIXED - Complex search terms: Terms inserted after a group received an incorrect boolean operator - GitHub #60
FIXED - Complex search terms: Higher level groups didn't work under some circumstances - GitHub #62
FIXED - Complex search terms: Mitigation for invalid multi-level groups - GitHub #63

Still only fixed in Betterbird 91, will ship in TB 102 in June/July 2022:

FIXED - Saving the message source didn't work - Bug 1759911
FIXED - Display of symbol fonts (Webdings, Wingdings, etc.) didn't work - Bug 1756720 - Bug 1757897
FIXED - News folders which weren't open didn't receive unread message notification (highlight colour, yellow biff symbol) - Bug 1751160
FIXED - Ctrl+scroll wheel zoom did not work in message source window - Bug 1655244
FIXED - Issue with MS teams invitation in Google Calendar - Bug 1727061
FIXED - Saving a draft failed to delete temporary files under some circumstances - Bug 1751461
FIXED - Alerts in Activity Manager were missing timestamp - Bug 1717307
NEW - Re-established Enigmail's "decrypt to folder" - Bug 1693332
FIXED - Detached attachments weren't opened from original location but from temp instead (causing potential lost changes) - Bug 1761973
FIXED - Empty trash on exit not reliable, especially for flaky servers like Yahoo - Bug 1745205
FIXED - Issues with folder subscription on servers using OAuth2 (Yahoo, etc.) - Bug 1759883
FIXED - Couldn't drag link to new composition - Bug 1732903
FIXED - Couldn't drag image from message to new composition - Bug 1753331
FIXED - All day events allowed time entry - Bug 1744442

Features and fixes exclusive to Betterbird:

91.10.0-bb33 (1 June 2022)

Based on Thunderbird 91.10.0, release notes.

Fixed in this version:

FIXED - Small issue related to "match all messages" filters

Still only fixed in Betterbird 91, will ship in TB 102 in June/July 2022:

FIXED - Saving the message source didn't work - Bug 1759911
FIXED - File name wasn't populated with saving attachment via double-click - Bug 1755592
FIXED - Display of symbol fonts (Webdings, Wingdings, etc.) didn't work - Bug 1756720 - Bug 1757897
FIXED - News folders which weren't open didn't receive unread message notification (highlight colour, yellow biff symbol) - Bug 1751160
FIXED - Ctrl+scroll wheel zoom did not work in message source window - Bug 1655244
FIXED - Issue with MS teams invitation in Google Calendar - Bug 1727061
FIXED - Saving a draft failed to delete temporary files under some circumstances - Bug 1751461
FIXED - Alerts in Activity Manager were missing timestamp - Bug 1717307
NEW - Re-established Enigmail's "decrypt to folder" - Bug 1693332
FIXED - Detached attachments weren't opened from original location but from temp instead (causing potential lost changes) - Bug 1761973
FIXED - Empty trash on exit not reliable, especially for flaky servers like Yahoo - Bug 1745205
FIXED - Issues with folder subscription on servers using OAuth2 (Yahoo, etc.) - Bug 1759883
FIXED - Couldn't drag link to new composition - Bug 1732903
FIXED - Couldn't drag image from message to new composition - Bug 1753331
FIXED - All day events allowed time entry - Bug 1744442

Features and fixes exclusive to Betterbird:

91.9.1-bb32 (21 May 2022)

Based on Thunderbird 91.9.1, release notes.

Fixed in this version:

FIXED - Various issues when using groups in complex search terms
FIXED - Lost threading when switching from a folder that had a multi-line view enabled
CHANGED - Portable version now ships as ZIP archive instead of self-extracting 7Zip archive

Fixed in this version (not fixed in Thunderbird):

FIXED - Various problems when saving the compose window as file - Bug 1676825
FIXED - Issues with folder subscription on servers using OAuth2 (Yahoo, etc.) - Bug 1759883

Still only fixed in Betterbird 91, will ship in TB 102 in June/July 2022:

FIXED - Saving the message source didn't work - Bug 1759911
FIXED - File name wasn't populated with saving attachment via double-click - Bug 1755592
FIXED - Display of symbol fonts (Webdings, Wingdings, etc.) didn't work - Bug 1756720 - Bug 1757897
FIXED - News folders which weren't open didn't receive unread message notification (highlight colour, yellow biff symbol) - Bug 1751160
FIXED - Ctrl+scroll wheel zoom did not work in message source window - Bug 1655244
FIXED - Issue with MS teams invitation in Google Calendar - Bug 1727061
FIXED - Saving a draft failed to delete temporary files under some circumstances - Bug 1751461
FIXED - Alerts in Activity Manager were missing timestamp - Bug 1717307
NEW - Re-established Enigmail's "decrypt to folder" - Bug 1693332
FIXED - Detached attachments weren't opened from original location but from temp instead (causing potential lost changes) - Bug 1761973
FIXED - Spacing and font size of "Insert Character/Symbol" menus in message compose window - Bug 1766404
FIXED - Empty trash on exit not reliable, especially for flaky servers like Yahoo - Bug 1745205

Features and fixes exclusive to Betterbird:

NEW - Multi-line view. View > Layout > Multi-line View On All Folders or per folder in the column picker
NEW - Header pane button customise restored - Bug 1556261
NEW - Search terms now allow for complex expressions by adding a group feature - Bug 297852
NEW - Quick Filter untagged messages - Bug 683809
FIXED - Global search in encrypted messages (needs to be enabled in preferences) - Bug 188988
NEW - Regular folder search and Quick Filter in encrypted messages - Bug 1562737
CHANGED - Windows systray tooltip now showing list folders with new messages - Bug 1721063
NEW - Context menu in a news message now includes "Open Message For ID" (message pane only, not in message in tab)
FIXED - New posts in ignored threads caused "phantom" unread messages. "Mark > Thread As Read" will fix corruption - Bug 799040
NEW - Preferences mail.addressDisplayAuthor and mail.addressDisplayRecipients (1 = name, 2 = e-mail, 3 = both) for message list display - Bug 697031
NEW - Showing file URL for detached attachments, correct size and strike-through for deleted files - Bug 1740956, Bug 1741093
NEW - Folder context menu now offers to set folder as startup folder (instead of last visited)
NEW - Add Recent menu to allow attaching recently used files (Windows only) - Bug 1560737
FIXED - Issues when dragging Windows shell link (.lnk) or folder to Write (compose) window - Bug 276869, Bug 524874
CHANGED - Activity manager opens in tab
FIXED - Attachments saved via double-click didn't get listed in the list of saved files (Ctrl+J) - Bug 1744709
FIXED - Copying NBSP replaced NBSP with regular space - Bug 359303
NEW - Ctrl+Shift+Space inserts NBSP now, also mostly fixes "automatic" unwanted NBSP replacement - Bug 532712
FIXED - Inserting links with spaces gave random erroneous results - Bug 1563452
FIXED - Repair Text Encoding didn't repair the subject - Bug 1739609

Not mentioned in the front page feature table:
NEW - Preference mail.openpgp.ignore_missing_mdc to allow display of attachments with missing MDC - Bug 1729221
NEW - Added preference mail.biff.show_for_server to optionally suppress biff notifications for server root folders.
FIXED - Subject change with "new subject (was: old subject)" didn't work - Bug 1680425
FIXED - All day events allowed time entry - Bug 1744442
CHANGED - HTML-only messages will no longer be sent to plain text recipients - Bug 1727493, comment #31
FIXED - Feed reader didn't tolerate any XML errors; now it will try fetching the feed as HTML as a fallback - Bug 1746749
FIXED - Couldn't drag link to new composition - Bug 1732903
FIXED - Couldn't drag image from message to new composition - Bug 1753331
FIXED - Moving multiple IMAP folders didn't work - Bug 589008
FIXED - Copying an embedded image didn't work under certain circumstances - Bug 1760365
FIXED - .startup-incomplete not deleted from profile - Bug 1762043
FIXED - Status text sometimes displayed "null" - Bug 1766578
FIXED - ... and a few more: Comma in detached file name (Bug 350825), Charset forward detection (Bug 1737245), Charset detection (Bug 1746695)

91.9.0-bb31 (30 April 2022)

Based on Thunderbird 91.9.0, release notes, advancing some fixes that Thunderbird isn't shipping yet.
We published a second build on 2 May 2022 to fix an issue with the complex search terms, see below.

Fixed in this version:

FIXED - Default buttons too bright on Linux with dark system theme - GitHub Issue #50
FIXED - External attachments in news feeds couldn't be opened - Backport error of Bug 1761973
NEW - Added en-dash (U+2013) to "Insert Character/Symbol" menu

Fixed in this version (not fixed in Thunderbird):

NEW - Search terms now allow for complex expressions by adding a group feature (with minor fix in Build-ID 2022-05-02) - Bug 297852
FIXED - Spacing and font size of "Insert Character/Symbol" menus in message compose window - Bug 1766404
FIXED - Status text sometimes displayed "null" - Bug 1766578

Still only fixed in Betterbird 91, will ship in TB 102 in June/July 2022:

Features and fixes exclusive to Betterbird:

NEW - Multi-line view. View > Layout > Multi-line View On All Folders or per folder in the column picker
NEW - Header pane button customise restored - Bug 1556261
NEW - Quick Filter untagged messages - Bug 683809
FIXED - Global search in encrypted messages (needs to be enabled in preferences) - Bug 188988
NEW - Regular folder search and Quick Filter in encrypted messages - Bug 1562737
CHANGED - Windows systray tooltip now showing list folders with new messages - Bug 1721063
NEW - Context menu in a news message now includes "Open Message For ID" (message pane only, not in message in tab)
FIXED - New posts in ignored threads caused "phantom" unread messages. "Mark > Thread As Read" will fix corruption - Bug 799040
NEW - Preferences mail.addressDisplayAuthor and mail.addressDisplayRecipients (1 = name, 2 = e-mail, 3 = both) for message list display - Bug 697031
NEW - Showing file URL for detached attachments, correct size and strike-through for deleted files - Bug 1740956, Bug 1741093
NEW - Folder context menu now offers to set folder as startup folder (instead of last visited)
NEW - Add Recent menu to allow attaching recently used files (Windows only) - Bug 1560737
FIXED - Issues when dragging Windows shell link (.lnk) or folder to Write (compose) window - Bug 276869, Bug 524874
CHANGED - Activity manager opens in tab
FIXED - Attachments saved via double-click didn't get listed in the list of saved files (Ctrl+J) - Bug 1744709
FIXED - Copying NBSP replaced NBSP with regular space - Bug 359303
NEW - Ctrl+Shift+Space inserts NBSP now, also mostly fixes "automatic" unwanted NBSP replacement - Bug 532712
FIXED - Inserting links with spaces gave random erroneous results - Bug 1563452
FIXED - Repair Text Encoding didn't repair the subject - Bug 1739609

Not mentioned in the front page feature table:
NEW - Preference mail.openpgp.ignore_missing_mdc to allow display of attachments with missing MDC - Bug 1729221
NEW - Added preference mail.biff.show_for_server to optionally suppress biff notifications for server root folders.
FIXED - Subject change with "new subject (was: old subject)" didn't work - Bug 1680425
FIXED - All day events allowed time entry - Bug 1744442
CHANGED - HTML-only messages will no longer be sent to plain text recipients - Bug 1727493, comment #31
FIXED - Feed reader didn't tolerate any XML errors; now it will try fetching the feed as HTML as a fallback - Bug 1746749
FIXED - Couldn't drag link to new composition - Bug 1732903
FIXED - Couldn't drag image from message to new composition - Bug 1753331
FIXED - Moving multiple IMAP folders didn't work - Bug 589008
FIXED - Copying an embedded image didn't work under certain circumstances - Bug 1760365
FIXED - .startup-incomplete not deleted from profile - Bug 1762043
FIXED - Empty trash on exit not reliable, especially for flaky servers like Yahoo - Bug 1745205
FIXED - ... and a few more: Comma in detached file name (Bug 350825), Charset forward detection (Bug 1737245), Charset detection (Bug 1746695)

91.8.1-bb30 (18 April 2022)

Based on Thunderbird 91.8.1, release notes, advancing some fixes that Thunderbird isn't shipping yet.

Fixed in this version (not fixed in Thunderbird):

FIXED - Empty trash on exit not reliable, especially for flaky servers like Yahoo - Bug 1745205
FIXED - Detached attachments weren't opened from original location but from temp instead (causing potential lost changes) - Bug 1761973
FIXED - Fixed some hard-coded brand names (showing Thunderbird instead of Betterbird) - Bug 1764806

Still only fixed in Betterbird 91, will ship in TB 102 in June/July 2022:

Features and fixes exclusive to Betterbird:

NEW - Multi-line view. View > Layout > Multi-line View On All Folders or per folder in the column picker
NEW - Header pane button customise restored - Bug 1556261
NEW - Quick Filter untagged messages - Bug 683809
FIXED - Global search in encrypted messages (needs to be enabled in preferences) - Bug 188988
NEW - Regular folder search and Quick Filter in encrypted messages - Bug 1562737
CHANGED - Windows systray tooltip now showing list folders with new messages - Bug 1721063
NEW - Context menu in a news message now includes "Open Message For ID" (message pane only, not in message in tab)
FIXED - New posts in ignored threads caused "phantom" unread messages. "Mark > Thread As Read" will fix corruption - Bug 799040
NEW - Preferences mail.addressDisplayAuthor and mail.addressDisplayRecipients (1 = name, 2 = e-mail, 3 = both) for message list display - Bug 697031
NEW - Showing file URL for detached attachments, correct size and strike-through for deleted files - Bug 1740956, Bug 1741093
NEW - Folder context menu now offers to set folder as startup folder (instead of last visited)
NEW - Add Recent menu to allow attaching recently used files (Windows only) - Bug 1560737
FIXED - Issues when dragging Windows shell link (.lnk) or folder to Write (compose) window - Bug 276869, Bug 524874
CHANGED - Activity manager opens in tab
FIXED - Attachments saved via double-click didn't get listed in the list of saved files (Ctrl+J) - Bug 1744709
FIXED - Copying NBSP replaced NBSP with regular space - Bug 359303
NEW - Ctrl+Shift+Space inserts NBSP now, also mostly fixes "automatic" unwanted NBSP replacement - Bug 532712
FIXED - Inserting links with spaces gave random erroneous results - Bug 1563452
FIXED - Repair Text Encoding didn't repair the subject - Bug 1739609

Not mentioned in the front page feature table:
NEW - Preference mail.openpgp.ignore_missing_mdc to allow display of attachments with missing MDC - Bug 1729221
NEW - Added preference mail.biff.show_for_server to optionally suppress biff notifications for server root folders.
FIXED - Subject change with "new subject (was: old subject)" didn't work - Bug 1680425
FIXED - All day events allowed time entry - Bug 1744442
CHANGED - HTML-only messages will no longer be sent to plain text recipients - Bug 1727493, comment #31
FIXED - Feed reader didn't tolerate any XML errors; now it will try fetching the feed as HTML as a fallback - Bug 1746749
FIXED - Couldn't drag link to new composition - Bug 1732903
FIXED - Couldn't drag image from message to new composition - Bug 1753331
FIXED - Moving multiple IMAP folders didn't work - Bug 589008
FIXED - Copying an embedded image didn't work under certain circumstances - Bug 1760365
FIXED - .startup-incomplete not deleted from profile - Bug 1762043
FIXED - ... and a few more: Comma in detached file name (Bug 350825), Charset forward detection (Bug 1737245), Charset detection (Bug 1746695)

91.8.0-bb29 (2 April 2022)

Based on Thunderbird 91.8.0, release notes, advancing some fixes that Thunderbird isn't shipping yet.

Fixed in this version (not fixed in Thunderbird):

FIXED - Copying NBSP replaced NBSP with regular space - Bug 359303
NEW - Ctrl+Shift+Space inserts NBSP now, also mostly fixes "automatic" unwanted NBSP replacement - Bug 532712
FIXED - Saving the message source didn't work - Bug 1759911
FIXED - Copying an embedded image didn't work under certain circumstances - Bug 1760365
FIXED - .startup-incomplete not deleted from profile - Bug 1762043

Still only fixed in Betterbird 91, will ship in TB 102 in June/July 2022:

FIXED - File name wasn't populated with saving attachment via double-click - Bug 1755592
FIXED - Display of symbol fonts (Webdings, Wingdings, etc.) didn't work - Bug 1756720 - Bug 1757897
FIXED - News folders which weren't open didn't receive unread message notification (highlight colour, yellow biff symbol) - Bug 1751160
FIXED - Ctrl+scroll wheel zoom did not work in message source window - Bug 1655244
FIXED - Issue with MS teams invitation in Google Calendar - Bug 1727061
FIXED - Saving a draft failed to delete temporary files under some circumstances - Bug 1751461
FIXED - Failures when posting to newsgroup sometimes showed SMTP error - Bug 1751466, comment #5
FIXED - Alerts in Activity Manager were missing timestamp - Bug 1717307
NEW - Re-established Enigmail's "decrypt to folder" - Bug 1693332

Features and fixes exclusive to Betterbird:

NEW - Multi-line view. View > Layout > Multi-line View On All Folders or per folder in the column picker
NEW - Header pane button customise restored - Bug 1556261
NEW - Quick Filter untagged messages - Bug 683809
FIXED - Global search in encrypted messages (needs to be enabled in preferences) - Bug 188988
NEW - Regular folder search and Quick Filter in encrypted messages - Bug 1562737
CHANGED - Windows systray tooltip now showing list folders with new messages - Bug 1721063
NEW - Context menu in a news message now includes "Open Message For ID" (message pane only, not in message in tab)
FIXED - New posts in ignored threads caused "phantom" unread messages. "Mark > Thread As Read" will fix corruption - Bug 799040
NEW - Preferences mail.addressDisplayAuthor and mail.addressDisplayRecipients (1 = name, 2 = e-mail, 3 = both) for message list display - Bug 697031
NEW - Showing file URL for detached attachments, correct size and strike-through for deleted files - Bug 1740956, Bug 1741093
NEW - Folder context menu now offers to set folder as startup folder (instead of last visited)
NEW - Add Recent menu to allow attaching recently used files (Windows only) - Bug 1560737
FIXED - Issues when dragging Windows shell link (.lnk) or folder to Write (compose) window - Bug 276869, Bug 524874
CHANGED - Activity manager opens in tab
FIXED - Attachments saved via double-click didn't get listed in the list of saved files (Ctrl+J) - Bug 1744709
FIXED - Inserting links with spaces gave random erroneous results - Bug 1563452
FIXED - Repair Text Encoding didn't repair the subject - Bug 1739609

Not mentioned in the front page feature table:
NEW - Preference mail.openpgp.ignore_missing_mdc to allow display of attachments with missing MDC - Bug 1729221
NEW - Added preference mail.biff.show_for_server to optionally suppress biff notifications for server root folders.
FIXED - Subject change with "new subject (was: old subject)" didn't work - Bug 1680425
FIXED - All day events allowed time entry - Bug 1744442
CHANGED - HTML-only messages will no longer be sent to plain text recipients - Bug 1727493, comment #31
FIXED - Feed reader didn't tolerate any XML errors; now it will try fetching the feed as HTML as a fallback - Bug 1746749
FIXED - Couldn't drag link to new composition - Bug 1732903
FIXED - Couldn't drag image from message to new composition - Bug 1753331
FIXED - Moving multiple IMAP folders didn't work - Bug 589008
FIXED - ... and a few more: Comma in detached file name (Bug 350825), Charset forward detection (Bug 1737245), Charset detection (Bug 1746695)

91.7.0-bb28 (5 March 2022)

Based on Thunderbird 91.7.0, release notes, advancing some fixes that Thunderbird isn't shipping yet.

Fixed in this version:

FIXED - Minor visual glitch in About box when offering new version

Fixed in this version (not fixed in Thunderbird):

NEW - Add Recent menu to allow attaching recently used files (Windows only) - Bug 1560737
FIXED - Issues when dragging Windows shell link (.lnk) or folder to Write (compose) window - Bug 276869, Bug 524874
FIXED - Moving multiple IMAP folders didn't work - Bug 589008
FIXED - Display of symbol fonts (Webdings, Wingdings, etc.) didn't work - Bug 1756720 - Bug 1757897
FIXED - File name wasn't populated with saving attachment via double-click - Bug 1755592

Still only fixed in Betterbird 91, will ship in TB 102 in June/July 2022:

FIXED - News folders which weren't open didn't receive unread message notification (highlight colour, yellow biff symbol) - Bug 1751160
FIXED - Ctrl+scroll wheel zoom did not work in message source window - Bug 1655244
FIXED - Issue with MS teams invitation in Google Calendar - Bug 1727061
FIXED - Saving a draft failed to delete temporary files under some circumstances - Bug 1751461
FIXED - Failures when posting to newsgroup sometimes showed SMTP error - Bug 1751466, comment #5
FIXED - Alerts in Activity Manager were missing timestamp - Bug 1717307
FIXED - Erroneous check of author's e-mail address during follow-up to newsgroup - Bug 1752741
NEW - Re-established Enigmail's "decrypt to folder" - Bug 1693332

Features and fixes exclusive to Betterbird:

NEW - Multi-line view. View > Layout > Multi-line View On All Folders or per folder in the column picker
NEW - Header pane button customise restored - Bug 1556261
NEW - Quick Filter untagged messages - Bug 683809
FIXED - Global search in encrypted messages (needs to be enabled in preferences) - Bug 188988
NEW - Regular folder search and Quick Filter in encrypted messages - Bug 1562737
CHANGED - Windows systray tooltip now showing list folders with new messages - Bug 1721063
NEW - Context menu in a news message now includes "Open Message For ID" (message pane only, not in message in tab)
FIXED - New posts in ignored threads caused "phantom" unread messages. "Mark > Thread As Read" will fix corruption - Bug 799040
NEW - Preferences mail.addressDisplayAuthor and mail.addressDisplayRecipients (1 = name, 2 = e-mail, 3 = both) for message list display - Bug 697031
NEW - Showing file URL for detached attachments, correct size and strike-through for deleted files - Bug 1740956, Bug 1741093
NEW - Folder context menu now offers to set folder as startup folder (instead of last visited)
CHANGED - Activity manager opens in tab
FIXED - Attachments saved via double-click didn't get listed in the list of saved files (Ctrl+J) - Bug 1744709
FIXED - Inserting links with spaces gave random erroneous results - Bug 1563452
FIXED - Repair Text Encoding didn't repair the subject - Bug 1739609

Not mentioned in the front page feature table:
NEW - Preference mail.openpgp.ignore_missing_mdc to allow display of attachments with missing MDC - Bug 1729221
NEW - Added preference mail.biff.show_for_server to optionally suppress biff notifications for server root folders.
FIXED - Subject change with "new subject (was: old subject)" didn't work - Bug 1680425
FIXED - All day events allowed time entry - Bug 1744442
CHANGED - HTML-only messages will no longer be sent to plain text recipients - Bug 1727493, comment #31
FIXED - Feed reader didn't tolerate any XML errors; now it will try fetching the feed as HTML as a fallback - Bug 1746749
FIXED - Couldn't drag link to new composition - Bug 1732903
FIXED - Couldn't drag image from message to new composition - Bug 1753331
FIXED - ... and a few more: Comma in detached file name (Bug 350825), Charset forward detection (Bug 1737245), Charset detection (Bug 1746695)

91.6.1-bb27 (15 February 2022)

Based on Thunderbird 91.6.1, release notes, advancing some fixes that Thunderbird isn't shipping yet.

Fixed in this version:

NEW - Folder context menu now offers to set folder as startup folder (instead of last visited)
FIXED - Problems with PGP messages "corrupted" via MS Exchange - GitHub #29
FIXED - Follow-up to: Couldn't drag link/image to new composition - Bug 1732903, Bug 1753331

Fixed in this version (not fixed in Thunderbird):

FIXED - Alerts in Activity Manager were missing timestamp - Bug 1717307
FIXED - Improvement to "Mark > Thread As Read" to fix corruption from Bug 799040 (see 91.6.0)
FIXED - Failures when posting to newsgroup sometimes showed SMTP error - Bug 1751466, comment #5
FIXED - Saving a draft failed to delete temporary files under some circumstances - Bug 1751461

Still only fixed in Betterbird, waiting for Thunderbird fix:

FIXED - News folders which weren't open didn't receive unread message notification (highlight colour, yellow biff symbol) - Bug 1751160
FIXED - Content of preferences pane went blank after toggling "Show only display name for people in my address book" - Bug 1748487
FIXED - Ctrl+scroll wheel zoom did not work in message source window - Bug 1655244
FIXED - Issue with MS teams invitation in Google Calendar - Bug 1727061
FIXED - Problem opening attachments with unregistered MIME type - Bug 1747360
FIXED - Couldn't copy text from preferences pane - Bug 1731934

Features and fixes exclusive to Betterbird:

NEW - Multi-line view. View > Layout > Multi-line View On All Folders or per folder in the column picker
NEW - Header pane button customise restored - Bug 1556261
NEW - Quick Filter untagged messages - Bug 683809
NEW - Re-established Enigmail's "decrypt to folder" - Bug 1693332
FIXED - Global search in encrypted messages (needs to be enabled in preferences) - Bug 188988
NEW - Regular folder search and Quick Filter in encrypted messages - Bug 1562737
CHANGED - Windows systray tooltip now showing list folders with new messages - Bug 1721063
NEW - Context menu in a news message now includes "Open Message For ID" (message pane only, not in message in tab)
FIXED - New posts in ignored threads caused "phantom" unread messages. "Mark > Thread As Read" will fix corruption - Bug 799040
NEW - Preferences mail.addressDisplayAuthor and mail.addressDisplayRecipients (1 = name, 2 = e-mail, 3 = both) for message list display - Bug 697031
NEW - Showing file URL for detached attachments, correct size and strike-through for deleted files - Bug 1740956, Bug 1741093
CHANGED - Activity manager opens in tab
FIXED - Attachments saved via double-click didn't get listed in the list of saved files (Ctrl+J) - Bug 1744709
FIXED - Inserting links with spaces gave random erroneous results - Bug 1563452
FIXED - Repair Text Encoding didn't repair the subject - Bug 1739609

Not mentioned in the front page feature table:
NEW - Preference mail.openpgp.ignore_missing_mdc to allow display of attachments with missing MDC - Bug 1729221
NEW - Added preference mail.biff.show_for_server to optionally suppress biff notifications for server root folders.
FIXED - Subject change with "new subject (was: old subject)" didn't work - Bug 1680425
FIXED - All day events allowed time entry - Bug 1744442
CHANGED - HTML-only messages will no longer be sent to plain text recipients - Bug 1727493, comment #31
FIXED - Feed reader didn't tolerate any XML errors; now it will try fetching the feed as HTML as a fallback - Bug 1746749
FIXED - Erroneous check of author's e-mail address during follow-up to newsgroup - Bug 1752741
FIXED - Couldn't drag link to new composition - Bug 1732903
FIXED - Couldn't drag image from message to new composition - Bug 1753331
FIXED - ... and a few more: Comma in detached file name (Bug 350825), Charset forward detection (Bug 1737245), Charset detection (Bug 1746695)

91.6.0-bb26 (5 February 2022)

Based on Thunderbird 91.6.0, release notes, advancing some fixes that Thunderbird isn't shipping yet.

Fixed in this version (not fixed in Thunderbird):

NEW - Context menu in a news message now includes "Open Message For ID" (message pane only, not in message in tab)
FIXED - New posts in ignored threads caused "phantom" unread messages. "Mark > Thread As Read" will fix corruption - Bug 799040
FIXED - Erroneous check of author's e-mail address during follow-up to newsgroup - Bug 1752741
FIXED - Couldn't copy text from preferences pane - Bug 1731934
FIXED - Couldn't drag link to new composition - Bug 1732903
FIXED - Couldn't drag image from message to new composition - Bug 1753331
FIXED - Problem opening attachments with unregistered MIME type - Bug 1747360

Still only fixed in Betterbird, waiting for Thunderbird fix:

Features and fixes exclusive to Betterbird:

NEW - Multi-line view. "View > Layout > Multi-line View On All Folders" or per folder in the column picker
NEW - Header pane button customise restored - Bug 1556261
NEW - Quick Filter untagged messages - Bug 683809
NEW - Re-established Enigmail's "decrypt to folder" - Bug 1693332
FIXED - Global search in encrypted messages (needs to be enabled in preferences) - Bug 188988
NEW - Regular folder search and Quick Filter in encrypted messages - Bug 1562737
CHANGED - Windows systray tooltip now showing list folders with new messages - Bug 1721063
NEW - Preferences mail.addressDisplayAuthor and mail.addressDisplayRecipients (1 = name, 2 = e-mail, 3 = both) for message list display - Bug 697031
NEW - Showing file URL for detached attachments, correct size and strike-through for deleted files - Bug 1740956, Bug 1741093
CHANGED - Activity manager opens in tab
FIXED - Attachments saved via double-click didn't get listed in the list of saved files (Ctrl+J) - Bug 1744709
FIXED - Inserting links with spaces gave random erroneous results - Bug 1563452
FIXED - Repair Text Encoding didn't repair the subject - Bug 1739609

Not mentioned in the front page feature table:
FIXED - Subject change with "new subject (was: old subject)" didn't work - Bug 1680425
FIXED - All day events allowed time entry - Bug 1744442
CHANGED - HTML-only messages will no longer be sent to plain text recipients - Bug 1727493, comment #31
FIXED - Feed reader didn't tolerate any XML errors; now it will try fetching the feed as HTML as a fallback - Bug 1746749
FIXED - ... and a few more: Comma in detached file name (Bug 350825), MDC (Bug 1729221), Charset forward detection (Bug 1737245), Charset detection (Bug 1746695)

91.5.1-bb25 (22 January 2022)

Fixed in this version (not fixed in Thunderbird):

Based on Thunderbird 91.5.0, release notes, advancing some fixes that Thunderbird isn't shipping yet.

NEW - Preferences mail.addressDisplayAuthor and mail.addressDisplayRecipients (1 = name, 2 = e-mail, 3 = both) for message list display - Bug 697031
CHANGED - HTML-only messages will no longer be sent to plain text recipients - Bug 1727493, comment #31
FIXED - News folders which weren't open didn't receive unread message notification (highlight colour, yellow biff symbol) - Bug 1751160
FIXED - Content of preferences pane went blank after toggling "Show only display name for people in my address book" - Bug 1748487
FIXED - Opening attachment: 'Open with...' radio button focused, but not checked - Bug 1749757

Still only fixed in Betterbird:

FIXED - Ctrl+scroll wheel zoom did not work in message source window - Bug 1655244
FIXED - Can't open/save attachments with "bad" characters in the filename (like :/\ on Windows) - Bug 1747977
FIXED - Feed reader didn't tolerate any XML errors; now it will try fetching the feed as HTML as a fallback - Bug 1746749
FIXED - Attachments saved via double-click didn't get listed in the list of saved files (Ctrl+J) - Bug 1744709
FIXED - All day events allowed time entry - Bug 1744442
FIXED - Issue with MS teams invitation in Google Calendar - Bug 1727061
FIXED - Repair Text Encoding didn't repair the subject - Bug 1739609
NEW - Showing file URL for detached attachments, correct size and strike-through for deleted files - Bug 1740956, Bug 1741093
FIXED - Subject change with "new subject (was: old subject)" didn't work - Bug 1680425
FIXED - Inserting links with spaces gave random erroneous results - Bug 1563452

91.5.0-bb24 (8 January 2022)

Based on Thunderbird 91.5.0, release notes, advancing some fixes that Thunderbird isn't shipping yet.

Fixed in this version:

FIXED - Scrollbars not working correctly when switching between normal and multi-line view
NEW - Allowing "group by sort" in multi-line view
NEW - Startup update check

Fixed in this version (not fixed in Thunderbird):

FIXED - Ctrl+scroll wheel zoom did not work in message source window - Bug 1655244
FIXED - Can't open/save attachments with "bad" characters in the filename (like :/\ on Windows) - Bug 1747977
FIXED - Original file sometimes deleted when attached via FileLink - Bug 1746860
FIXED - Save to local didn't work if cancelled during IMAP copying - Bug 1745676

Still only fixed in Betterbird:

FIXED - Feed reader didn't tolerate any XML errors; now it will try fetching the feed as HTML as a fallback - Bug 1746749
FIXED - Attachments saved via double-click didn't get listed in the list of saved files (Ctrl+J) - Bug 1744709
FIXED - All day events allowed time entry - Bug 1744442
FIXED - Issue with MS teams invitation in Google Calendar - Bug 1727061
FIXED - Repair Text Encoding didn't repair the subject - Bug 1739609
NEW - Showing file URL for detached attachments, correct size and strike-through for deleted files - Bug 1740956, Bug 1741093
FIXED - Subject change with "new subject (was: old subject)" didn't work - Bug 1680425
FIXED - Inserting links with spaces gave random erroneous results - Bug 1563452

91.4.1-bb23 "build 2" (20 December 2021)

Fixed in this version (not fixed in Thunderbird):

FIXED - Feed reader didn't tolerate any XML errors; now it will try fetching the feed as HTML as a fallback - Bug 1746749
FIXED - Regression from fixing "All day events allowed time entry" - Bug 1744442

91.4.1-bb23 (17 December 2021)

Based on Thunderbird 91.4.1, release notes.

Fixed in this version (not fixed in Thunderbird):

FIXED - Attachments saved via double-click didn't get listed in the list of saved files (Ctrl+J) - Bug 1744709
FIXED - All day events allowed time entry - Bug 1744442

Still only fixed in Betterbird:

FIXED - Issue with MS teams invitation in Google Calendar - Bug 1727061
FIXED - Repair Text Encoding didn't repair the subject - Bug 1739609
NEW - Showing file URL for detached attachments, correct size and strike-through for deleted files - Bug 1740956, Bug 1741093
FIXED - Subject change with "new subject (was: old subject)" didn't work - Bug 1680425
NEW - Print selection - Bug 1731183
FIXED - Inserting links with spaces gave random erroneous results - Bug 1563452

91.4.0-bb22 (3 December 2021)

Based on Thunderbird 91.4.0, release notes, advancing some fixes that Thunderbird isn't shipping yet.

Fixed in this version (not fixed in Thunderbird):

FIXED - Complete fix for Smart/unified/virtual based on folders with non-ASCII names not working - Bug 1739789
All other issues with folders with non-ASCII names should be fixed in this version
FIXED - Slow display of some PGP encrypted messages or those with AutoCrypt header - Bug 1742578
FIXED - Issue with MS teams invitation in Google Calendar - Bug 1727061
FIXED - Non-ASCII character in password didn't work during account setup - Bug 1735983

Still only fixed in Betterbird:

FIXED - Repair Text Encoding didn't repair the subject - Bug 1739609
FIXED - Duplicate drafts in folders with non-ASCII names, like German Gmail ("Entwürfe") - Bug 1739814
NEW - Showing file URL for detached attachments, correct size and strike-through for deleted files - Bug 1740956, Bug 1741093
FIXED - Double-click on detached attachment didn't work - Bug 1738490
FIXED - Subject change with "new subject (was: old subject)" didn't work - Bug 1680425
NEW - Print selection - Bug 1731183
FIXED - When opening attachments, "Do this automatically for files like this from now on" not working - Bug 1690395
FIXED - Inserting links with spaces gave random erroneous results - Bug 1563452

91.3.2-bb21 (23 November 2021)

Fixed in this version:

FIXED - Then replying, quote contained attachment list (regression in 91.3.1)
FIXED - Opening attachments not working for some users - Bug 1741820 Bug 1741510

Fixed in this version (not fixed in Thunderbird):

FIXED - Calendar printing not working at all - Bug 1742158
FIXED - Repair Text Encoding didn't repair the subject - Bug 1739609

Still only fixed in Betterbird:

FIXED - Duplicate drafts in folders with non-ASCII names, like German Gmail ("Entwürfe") - Bug 1739814
FIXED - Smart/unified/virtual based on folders with non-ASCII names not working - Bug 1739789
NEW - Showing file URL for detached attachments, correct size and strike-through for deleted files - Bug 1740956, Bug 1741093
FIXED - Double-click on detached attachment didn't work - Bug 1738490
FIXED - Print multiple messages, follow-up: Always print attachment list - Bug 1737730
FIXED - Subject change with "new subject (was: old subject)" didn't work - Bug 1680425
NEW - Print selection - Bug 1731183
FIXED - Print multiple messages - Bug 1737730
FIXED - Various text encoding issues in non-UTF-8 newsgroups - Bug 1734361
FIXED - When opening attachments, "Do this automatically for files like this from now on" not working - Bug 1690395
FIXED - Inserting links with spaces gave random erroneous results - Bug 1563452

91.3.2-bb20 (18 November 2021)

Based on Thunderbird 91.3.2, release notes

Warning! Various operations on folders with non-ASCII names are not working under certain circumstances in Thunderbird/Betterbird. Thunderbird is tracking this here: Bug 1739814, Bug 1739789 and Bug 1739903.
We are working on a solution and have already fixed the following in 91.3.2-bb20 "build 2"
FIXED ("build 2") - Duplicate drafts in folders with non-ASCII names, like German Gmail ("Entwürfe") - Bug 1739814
FIXED ("build 2") - Smart/unified/virtual based on folders with non-ASCII names not working - Bug 1739789

Still only fixed in Betterbird:

NEW - Showing file URL for detached attachments, correct size and strike-through for deleted files - Bug 1740956, Bug 1741093
FIXED - Double-click on detached attachment didn't work - Bug 1738490
FIXED - Print multiple messages, follow-up: Always print attachment list - Bug 1737730
FIXED - Subject change with "new subject (was: old subject)" didn't work - Bug 1680425
NEW - Print selection - Bug 1731183
FIXED - Print multiple messages - Bug 1737730
FIXED - Various text encoding issues in non-UTF-8 newsgroups - Bug 1734361
FIXED - When opening attachments, "Do this automatically for files like this from now on" not working - Bug 1690395
FIXED - Inserting links with spaces gave random erroneous results - Bug 1563452

91.3.1-bb19 (13 November 2021)

Based on Thunderbird 91.3.1, release notes

Fixed in this version (not fixed in Thunderbird):

Still only fixed in Betterbird:

NEW - Print selection - Bug 1731183
FIXED - Print multiple messages - Bug 1737730
FIXED - Various text encoding issues in non-UTF-8 newsgroups - Bug 1734361
FIXED - When opening attachments, "Do this automatically for files like this from now on" not working - Bug 1690395
FIXED - Inserting links with spaces gave random erroneous results - Bug 1563452
FIXED - "View > Repair Text Encoding" not working - Bug 1713786 - Users can restore the charset menu with this add-on

91.3.0-bb18 (3 November 2021)

Based on Thunderbird 91.3.0, release notes

Fixed in this version (not fixed in Thunderbird):

NEW - Print selection - Bug 1731183
FIXED - Print multiple messages - Bug 1737730

Still only fixed in Betterbird:

FIXED - Various text encoding issues in non-UTF-8 newsgroups - Bug 1734361
FIXED - ICS import fails with tasks (VTODO) - Bug 1727938
FIXED - When opening attachments, "Do this automatically for files like this from now on" not working - Bug 1690395
FIXED - Inserting links with spaces gave random erroneous results - Bug 1563452
FIXED - "View > Repair Text Encoding" not working - Bug 1713786 - Users can restore the charset menu with this add-on
FIXED - Add search engine via XML file not working - Bug 1718411

91.2.1-bb17 (19 October 2021)

Based on Thunderbird 91.2.1, release notes

Due to scheduling limitations fixes for bug 1730363 and bug 1175168 are not included.

Improvements over Thunderbird:

NEW - Regular folder search and Quick Filter in encrypted messages - Bug 1562737

Fixed in this version (not fixed in Thunderbird):

FIXED - Various text encoding issues in non-UTF-8 newsgroups - Bug 1734361

Still only fixed in Betterbird:

FIXED - ICS import fails with tasks (VTODO) - Bug 1727938
FIXED - When opening attachments, "Do this automatically for files like this from now on" not working - Bug 1690395
FIXED - Inserting links with spaces gave random erroneous results - Bug 1563452
FIXED - "View > Repair Text Encoding" not working - Bug 1713786 - Users can restore the charset menu with this add-on
FIXED - Add search engine via XML file not working - Bug 1718411

91.2.0-bb16 (4 October 2021)

Based on Thunderbird 91.2.0, release notes

Fixed in this version:

FIXED - Linux executable now showing as gearwheel/cogwheel (if file browser has necessary support)

Fixed in this version (not fixed in Thunderbird):

FIXED - Dangerous issue were under certain rare circumstances Bcc recipients are published to all recipients - Bug 1733651

Still only fixed in Betterbird:

91.1.2-bb15 (27 September 2021)

Based on Thunderbird 91.1.2, release notes

Improvements over Thunderbird:

NEW - Minor improvements of the multi-line view that shipped in 91.1.1-bb14
FIXED - Remaining issue in global search in encrypted messages (was first shipped in 91.0-bb8, 5 August 2021)

Still only fixed in Betterbird:

FIXED - ICS import fails with tasks (VTODO) - Bug 1727938
FIXED - When opening attachments, "Do this automatically for files like this from now on" not working - Bug 1690395
FIXED - Event invitations not showing all information (HTML part not displayed) - Bug 760412
FIXED - Inserting links with spaces gave random erroneous results - Bug 1563452
FIXED - "View > Repair Text Encoding" not working - Bug 1713786 - Users can restore the charset menu with this add-on
FIXED - Add search engine via XML file not working - Bug 1718411

91.1.1-bb14 (15 September 2021)

Based on Thunderbird 91.1.1, release notes, advancing some fixes that Thunderbird isn't shipping yet.

Improvements over Thunderbird:

NEW - Multi-line view, yes!! Finally after 18 years. "View > Layout > Multi-line View On All Folders" or per folder in the column picker

Fixed in this version:

FIXED - Various minor fixes that Thunderbird will ship later, mostly related to sending attachments:
Bug 1727830 Bug 1729432 Bug 1729279 Bug 1728705 Bug 1729437

Still only fixed in Betterbird:

91.1.0-bb13 (2 September 2021)

Based on Thunderbird 91.1.0, release notes, advancing many fixes that Thunderbird isn't shipping yet.

Improvements over Thunderbird:

NEW - Added preference mail.biff.show_for_server to optionally suppress biff notifications for server root folders.

Fixed in this version:

FIXED - ICS import fails with tasks (VTODO) - Bug 1727938

Still only fixed in Betterbird:

FIXED - HTTP images not attached - Bug 1727164
FIXED - Attachment list not printed - Bug 1727055
FIXED - Printing confusion when multiple messages were selected - Bug 1727107
FIXED - Filter check boxes not displayed correctly - Bug 1727366
FIXED - When opening attachments, "Do this automatically for files like this from now on" not working - Bug 1690395
FIXED - Event invitations not showing all information (HTML part not displayed) - Bug 760412
FIXED - Inserting links with spaces gave random erroneous results - Bug 1563452
FIXED - "View > Repair Text Encoding" not working - Bug 1713786 - Users can restore the charset menu with this add-on
FIXED - Add search engine via XML file not working - Bug 1718411

91.0.3-bb12 (25 August 2021)

Based on Thunderbird 91.0.3, release notes, advancing many fixes that Thunderbird isn't shipping yet.

Fixed in this version:

Still only fixed in Betterbird:

FIXED - When opening attachments, "Do this automatically for files like this from now on" not working - Bug 1690395
FIXED - Event invitations not showing all information (HTML part not displayed) - Bug 760412
FIXED - Inserting links with spaces gave random erroneous results - Bug 1563452
FIXED - "View > Repair Text Encoding" not working - Bug 1713786 - Users can restore the charset menu with this add-on
FIXED - Add search engine via XML file not working - Bug 1718411

91.0.2-bb11 (21 August 2021)

Mostly the same as 91.0.2-bb10, but with additional fixes. Based on Thunderbird 91.0.2, release notes.

Fixed in this version:

FIXED - Issue when using "minimise to tray", systray icon disappeared under certain circumstances
FIXED - Some branding issue we Thunderbird/Mozilla Corporation was displayed instead of Betterbird/Betterbird Project
FIXED - When opening attachments, "Do this automatically for files like this from now on" not working - Bug 1690395

91.0.2-bb10 (20 August 2021)

Based on Thunderbird 91.0.2, release notes.

Still only fixed in Betterbird:

FIXED - Event invitations not showing all information (HTML part not displayed) - Bug 760412
FIXED - Folder pane toolbar disappeared after restart - Bug 1725460
FIXED - Inserting links with spaces gave random erroneous results - Bug 1563452
FIXED - "View > Repair Text Encoding" not working - Bug 1713786 - Users can restore the charset menu with this add-on
FIXED - Add search engine via XML file not working - Bug 1718411

91.0.1-bb9 (17 August 2021)

Based on Thunderbird 91.0.1, release notes.

Improvements over Thunderbird:

NEW - Re-established Enigmail's "decrypt to folder" - Bug 1693332
CHANGED - Improved drag and drop feedback when adding attachments - Bug 1725581
FIXED - Event invitations not showing all information (HTML part not displayed) - Bug 760412
FIXED - Folder pane toolbar disappeared after restart - Bug 1725460

Still only fixed in Betterbird:

FIXED - Inserting links with spaces gave random erroneous results - Bug 1563452
FIXED - "View > Repair Text Encoding" not working - Bug 1713786 - Users can restore the charset menu with this add-on
FIXED - Add search engine via XML file not working - Bug 1718411

91.0-bb8 (5 August 2021)

Based on Thunderbird 91.0, release notes.

Improvements over Thunderbird:

FIXED - Global search in encrypted messages (needs to be enabled in preferences) - Bug 188988
NEW - Quick Filter untagged messages - Bug 683809

Still only fixed in Betterbird:

91.0beta6-bb7 (2 August 2021)

Based on Thunderbird 91.0 beta 6, release notes.

NEW - Betterbird installer now self-signed. You need to install a trusted root certificate to see it.

Improvements over Thunderbird:

FIXED - Inserting links with spaces gave random erroneous results - Bug 1563452

Still only fixed in Betterbird:

FIXED - "View > Repair Text Encoding" not working - Bug 1713786 - Users can restore the charset menu with this add-on
FIXED - Add search engine via XML file not working - Bug 1718411

91.0beta5-bb6 (29 July 2021)

Based on Thunderbird 91.0 beta 5, release notes.

Improvements over Thunderbird:

CHANGED - Windows systray tooltip now showing list folders with new messages - Bug 1721063

Still only fixed in Betterbird:

FIXED - Event invitation not displayed - Bug 1723116
FIXED - Moving accounts after "Local Folders" is reverted at next startup - Bug 1721574
FIXED - "View > Repair Text Encoding" not working - Bug 1713786 - Users can restore the charset menu with this add-on
FIXED - Add search engine via XML file not working - Bug 1718411

91.0beta4-bb5 (26 July 2021)

Based on Thunderbird 91.0 beta 4, release notes.

Improvements over Thunderbird:

CHANGED - Even further improvements to Windows systray display - Bug 1721063

Still only fixed in Betterbird:

FIXED - Moving accounts after "Local Folders" is reverted at next startup - Bug 1721574
FIXED - "View > Repair Text Encoding" not working - Bug 1713786 - Users can restore the charset menu with this add-on
FIXED - Add search engine via XML file not working - Bug 1718411

91.0beta3-bb4 (22 July 2021)

Based on Thunderbird 91.0 beta 3, release notes.

Improvements over Thunderbird:

CHANGED - Further improvements to Windows systray display - Bug 1721063
FIXED - Moving accounts after "Local Folders" is reverted at next startup - Bug 1721574

Still only fixed in Betterbird:

FIXED - "View > Repair Text Encoding" not working - Bug 1713786 - Users can restore the charset menu with this add-on
FIXED - Add search engine via XML file not working - Bug 1718411
FIXED - Printing crashed or hung - Bug 1720397 Bug 1714639

91.0beta2-bb3 (20 July 2021)

Based on Thunderbird 91.0 beta 2, release notes.

Improvements over Thunderbird:

CHANGED - Improvements to Windows systray display - Bug 1721063

Still only fixed in Betterbird:

91.0beta1-bb2 (14 July 2021)

Based on Thunderbird 91.0 beta 1, release notes.

The Thunderbird notes don't mention:

FIXED - "Weekday, time" display not working with pref mail.ui.display.dateformat.thisweek = 4 - Bug 1672548

Improvements over Thunderbird:

NEW - Header pane button customise restored - Bug 1556261
CHANGED - Activity Manager opens in tab
CHANGED - Open saved EML file with X-Unsent header opens in Write window - Bug 166541
FIXED - "View > Repair Text Encoding" not working - Bug 1713786 - Users can restore the charset menu with this add-on
FIXED - Add search engine via XML file not working - Bug 1718411
FIXED - Opening PDF attachment in IMAP message crashed - Bug 1663859
FIXED - First message after start displayed garbled (if non-ASCII) - Bug 1718119
FIXED - Printing crashed or hung - Bug 1720397 Bug 1714639
FIXED - Inline display of message/rfc822 attachments did not show headers - Bug 1715726

91.0beta1-bb1 (12 July 2021)

This is an early release based on Thunderbird 91.0 beta code, hot off the press. Not officially released yet, hasn't been through Thunderbird's own testing.