Thunderbird Desktop
Version 161.0beta | Released November 9, 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 161 beta 1 released November 9, 2026.
System Requirements: Details
What’s New
new
Unread count badges are available on supported Linux taskbars
What’s Changed
changed
OTR chat encryption is disabled by default for profiles that never used it
What’s Fixed
fixed
The Subscribe dialog continued to show "Please wait" after loading
fixed
The Quick Filter keyboard shortcut could stop working
fixed
Compose commands failed when feed articles were displayed as web pages
fixed
Shift+Space scrolled messages down when focus was in the message list
fixed
Selecting a message in a thread summary did not scroll it into view
fixed
Changing saved search matching options could insert an invalid search field
fixed
Ctrl+Enter could require two presses to send a message
fixed
Tab from the Subject field required an extra press to reach the message body
fixed
Ctrl+V could unexpectedly send a message
fixed
Forwarding IMAP messages failed in some folders with spaces in their names
fixed
Birthdays without a year were not saved in Google address books
fixed
New Contact and New List were missing from the address book context menu
fixed
Editing vCard 3.0 contacts could lose the preferred phone number
fixed
Some CardDAV birthdays without a year incorrectly displayed the year 1604
fixed
Adding a second Exchange account could show messages from first account
fixed
Concurrent offline Exchange downloads could display the wrong message body
fixed
Sending messages could incorrectly report an error applying filters
fixed
SMTP CRAM-MD5 authentication could fail with some server challenges
