Mozilla Thunderbird Beta

Resumen localizado

159.0b1 añade indicadores de correo no leído en Linux y detección de calendarios Graph. Corrige correo, adjuntos, búsqueda, autenticación, CardDAV/CalDAV, límites de Graph y calendarios, además de engaños con Reply-To, inyección SMTP/RSS y contenido remoto. La página oficial especifica beta 1; se conserva el texto completo.

Texto oficial completo en inglés (no es una traducción íntegra)

Thunderbird Desktop Version 159.0beta | Released October 12, 2026 Check out the notes below for this version of Thunderbird. As always, you’re encouraged to tell us what you think, ask for help, or file a bug in Bugzilla. These notes apply to Thunderbird version 159 beta 1 released October 12, 2026. System Requirements: Details What’s New new Linux tray icons indicate unread mail and show its count in the tooltip 1946946 new Graph calendars are auto-detected on new account creation 2052324 What’s Fixed fixed Non-ASCII IMAP tags could exceed server length limits and be rejected 2073409 fixed Zoom Text Only option did not work in the View menu 2075594 fixed Multiple messages were printed even after canceling the print dialog 2076335 fixed Save All and Detach All failed for attachments with invalid filename paths 2076435 fixed First Wrap Long Lines toggle did nothing in View Source 2076654 fixed POP3 NTLM authentication failed because the password was sent incorrectly 2076742 fixed Search Messages menu option was enabled but did not work for saved search folders 1923075 fixed Quick Find shortcut (/) only worked after Ctrl+F was used once 2067593 fixed Unicode email addresses could hide different Reply-To destinations 2076034 fixed Newsgroups with UTF-8 names could display duplicate or incorrect messages 2068200 fixed View > Folders did nothing in Calendar and Tasks tabs 2078239 fixed Global search results did not display recipients in the To field 2075316 fixed Forwarding malformed MIME messages could omit attachments 548507 fixed Retry and Save Locally failed after a sent-folder copy error 2068501 fixed Closing an unmodified compose window prompted to save when using Body Text 2075909 fixed MP4 attachments could be truncated when forwarding messages 2077839 fixed Inline images disappeared when editing local or POP messages as new 2078784 fixed EWS/Graph accounts could fail when outgoing server settings were incomplete 2067724 fixed Account Hub Edit Configuration did nothing for Exchange and Graph accounts 2075408 fixed First message filter condition could not be removed even when others existed 2070351 fixed CardDAV address book sync stopped when the server rejected an invalid sync token 1912673 fixed CardDAV passwords were not saved, causing repeated login prompts after restart 2030007 fixed Malformed message database files could cause excessive CPU usage 2077833 fixed IMAP namespace root folders were inaccessible due to duplicated folder names 2005701 fixed Excessive Microsoft Graph requests caused throttling and delayed message display 2075389 fixed SMTP addresses with line breaks could inject unintended commands 2075922 fixed POP3 sessions remained active after canceling the password prompt 2076749 fixed Remote content could load in news articles with missing message headers 2079222 fixed RSS feeds could inject arbitrary Message-ID and References headers 2077741 fixed Large ICS calendar files could exhaust memory and freeze Thunderbird 2058953 fixed CalDAV calendars could stop syncing after a network error until restart 2076473 fixed Yearly recurring events with multiple times per day only appeared at the first time 2074745 fixed Visual and UX improvements 2075076 2078240 2079609 2079622 See All Releases

Sources

• Official release notes
• Official Homebrew cask metadata