Add-ons
Useful Thunderbird Add-ons
by Leon
About this Collection
13 Add-ons in this Collection
Provider for Google Calendar
by Philipp Kewisch
192,777 users
Allows bidirectional access to Google Calendar
Manually sort folders
by Jonathan Protzenko, Itagaki Fumihiko
12,196 users
This extension allows you to manually sort (order) your folders in the folder pane of Thunderbird or automatically sort them, but in a better way. This extension also allows you to re-order accounts in the folder pane.
Emoji
XNote++
by opto
16,884 users
Persistent sticky notes associated to emails. You can fulltext search with constraints/email them/print/bookmark/copy to clipboard.
If you have a large screen, you can even display the notes outside of TB's main window, so it won't hide anything.
Google Keep Tab
Quick Folder Move
by Philipp Kewisch
7,474 users
When filing messages, a search box will show up allowing you to quickly enter the folder name you want to move to.
If no search term is entered, a list of recent folders will show up instead.
Windows Taskbar Unread Badge
by Brandon Streiff
446 users
Put an unread mail count badge on the Thunderbird icon in the Windows taskbar.
GCalTab
by Florent Tassy
1,794 users
GCalTab is a Thunderbird add-on that opens Google Calendar website in a Thunderbird tab. It features a beautiful dark mode thanks to the DarkReader algorithm.
BorderColors D
by dreadnaut
8,076 users
Shows a colorful border around the "New Message" window, so you can tell different identities apart.
Builds on the original BorderColors and the "GT" version, adding different border styles.
Display Mail User Agent T
by Toshi
11,679 users
Displays the mail program with which the selected mail was written
*This addon is compatible with Thunderbird after Web Extesnsions support. Since development and operation check are done on Daily, it may not work on normal Thunderbird.
Hide Local Folders for TB78++
by C-E
1,877 users
Removes the 'Local Folders' entry from the folder pane.
(The folder itself will stay existent.)
(Based on the original work of Alex Cabal.)
Minimize on Close
by rsjtdrjgfuzkfg
41,061 users
Causes Thunderbird's main window to minimize instead of closing. You can still close Thunderbird through the menu.
Spam Scores
by Christian Zaenker
1,767 users
Displays spam scores according to mail headers. Supports spam/ham score headers of Rspamd, SpamAssassin and MailScanner. The add-on adds a column with the overall spam score to the mail list view and shows details of any matched spam/ham rule.
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