Most Popular Extensions
Sort by:
Rage Hoye
Requires Restart
Prevents you from sending offensive mails based on a keyword list
All Menus Button
Show all the menus in a single menu button that can be placed anywhere. Also contains replacement buttons for the default menus.
SecondOpinion
Requires Restart
This extension implements a convenient way to check and upload attachments against VirusTotal.com
XL2Report
Requires Restart
Report und grafische Auswertung für Messungen mit dem XL2-Audio und Akustik Analyzer von NTi Audio
Copy Reminder List To Clipboard
Provides button to copy the list of current reminders to the clipboard.
Disable About Something
Requires Restart
Provides ability to disable "about:*" pages by the configuration.
KDE5 Wallet password integration
Requires Restart
This extension enable passwords and form logins to be stored in KDE5 Wallet
Periodic Memory Usage Dumper
Saves memory usage information periodically (mainly for troubleshooting), for web/addon developers.
Hide Badge Icon
Requires Restart
Hides the badge for new messages of the Thunderbird app icon on Mac OSX.
BccBlocker
Requires Restart
A ThunderBird extension to prevent the use of the Bcc field.
Bcc is the worst thing ever.
It kills transparency inside an organization.
If you use the Bcc feature, you should ask yourself why..
To create your own collections, you must have a Mozilla Add-ons account.