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Join UsVersion 91.3.1, first offered to channel users on November 15, 2021
OpenPGP public keys will no longer count as an attachment in the message list
Adding a search engine via URL now supported
FileLink messages' template updated; Thunderbird advertisement removed
After an update, Thunderbird will now check installed addons for updates
New mail popups were displayed while running full screen applications
Messages received with non-standard "koi8r" encoding were not supported
Various macOS stability improvements
PDF attachments opened in Firefox while composing an email
Addons were disabled when "Offline Settings" were set to "Ask me for online state (on startup)"
Clicking '"addons://" links in the Addons Manager prompted for an application to open it, rather than opening internally
The Contacts sidebar "Address Book" drop down was unreadable on Windows
vCard attachments were not shown when using "inline" view for attachments
Importing an ICS file with TODO items failed