Resumo localizado
159.0b1 adiciona indicação de mensagens não lidas no Linux e descoberta de calendários Graph. Corrige e-mail, anexos, busca, autenticação, CardDAV/CalDAV, limitação do Graph e calendários, incluindo enganos com Reply-To, injeção SMTP/RSS e conteúdo remoto. A página oficial especifica beta 1; o texto completo está preservado.
Texto oficial completo em inglês (não é tradução integral)
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
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