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Join UsVersion 78.0beta, first offered to channel users on June 16, 2020
Color customization of Folder Pane icons
Additional Enterprise policies
Calendar: Add event preview to ICS import dialog
OpenPGP support improvements
Various Address Book improvements
Dark mode improvements
Use scalable icons throughout Thunderbird
Account settings UI improvements
MailExtensions: Handle message attachments in browser.compose functions
Calendar: Location URLs are now clickable
Various fixes for recipient address entry
Fixed width font not working in Write window
Accessibility improvements
Attachment pane in message preview layout broke when toggled or resized
Access key Alt+M for the attachment pane of the Write window not working correctly
Addons could not be removed
MailExtensions: browser.identity API enabled
MailExtensions: Event fired when the user changes compose identity
Improvements to the location bar of a tab displaying web pages
Several improvements to vCard parsing
Various look and feel improvements
Print-progress dialog was disabled
"Clear Recent History" window did nothing
"Initially Show Attachment Pane" option was not working for Write window
Links in the Account Central content tab opened in Thunderbird as well as the browser
Order of columns in the thread pane was not persisted correctly
URLs in the message header display were not reachable via keyboard
Calendar: URLs in the event reminder dialog were not clickable
MailExtensions: Extension popup windows opened in a copy of the main window
Preference to disable OpenPGP functionality
MailExtensions: UI components for browser pages added
OpenPGP support did not work on some Linux distributions when using the official builds
Thunderbird 78 did not run on Red Hat Linux 7
Anomalies appeared when inserting an image into the compose window
Chat: Copying from chat conversations not working
Chat: Direct message support for Matrix
OpenPGP improvements
Various look and feel improvements
Addresses added to address book were not inserted into sorted order
Address book migration not working under certain circumstances
Chat: Own messages not displayed in private chats when server supports "echo-message"
MailExtensions: Tab was not defined in browser.menus.onClicked callback on out-of-window messages
MailExtensions: Select elements in action popups closed the window unexpectedly
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