Get Involved
Thunderbird is an open source project, which means anyone can contribute ideas, designs, code, and time helping fellow users.
Join UsVersion 70.0beta, first offered to channel users on September 9, 2019
Allow selecting messages via selection boxes instead of classic selection. "Select Messages" column needs to be selected via the thread pane's column picker.
Message Display MailExtensions API with documentation here
Thunderbird Options/Preferences tab redesigned and with new user interface
Account creation dialog redesigned and with new user interface
Dialog for folder compaction (purging of deleted messages)
Thread pane column picker stays open for selecting multiple columns until user clicks outside or hits escape
Add-ons manager with new user interface and notifications. Note that manual installation of add-ons via drag-and-drop currently doesn't work.
Gmail accounts ignored a non-standard trash folder selection. Note: If non-standard trash folder was selected previously in the account settings, this setting will now take effect which may be unexpected.
Edit tag not working
Write window: "Insert > Characters and Symbols" not working
Moving/dragging messages from "Search Messages" result dialog not working
Command line -compose "attachment=" not working
Custom views not working
Issues with list of content types/actions for incoming attachments
Clicking mailto links in browser doesn't open Thunderbird Write window
"Learn More" links in Error Console not working
Visual glitches: Quick Filter Bar tag buttons too tall, missing scroll bar on Connection Setting subdialog, LDAP server selection after "New", "Edit" and "Delete"
Calendar: Parts of CalDAV dialog not working
Calendar: Free/busy information in attendees dialog not loaded
Issues with attachments in IMAP messages
Various theme fixes, especially dark theme improvements for Calendar
Contrast between tag label and background not optimal
Accepting auto-complete results via click didn't move to the next line
Account Central pane always loaded at start-up
Setting a contact photo in the addressbook not working
Manual installation of add-ons via drag & drop onto the Add-ons Manager not working
"Config Editor" button not removed if blocked by policy
Visual glitches: Missing context menu in filter, downloads and password manager dialogs, unwanted scrollbars and cut-off text in Account Manager, incorrect colors in Calendar MiniMonth and agenda scrollbars, theme issues on Windows 7
Some attachments couldn't be opened in messages originating from MS Outlook 2016
Address book import form CSV
Performance problem in message body search
Ctrl+Enter to send a message would open an attachment if the attachment pane had focus
Template selection for "Reply with Template"
Calendar: Issues with "Today Pane" start-up
Calendar: Glitches with custom repeat and reminder number input
Calendar: Problems with WCAP provider
Better visual feedback for unread messages when using the dark theme
Various issues when editing mailing lists
Integration with macOS addressbook and notifications not working after introduction of notarization
Calendar: Lightning not updating to corresponding 70.0b4 version. Workaround: Set preference extensions.lastAppVersion
to a value of 69.0 to force a refresh. Check version number in the Add-on Manager afterwards.
Opening the properties of a folder may hang on Mac
Chat: Twitter not working due to API changes at Twitter.com.