Recently Updated Extensions
Custom Sender Address and Reply Requires Restart
Select sender mail address based on the recipient and reply with the same address
Flexible Identity Requires Restart
Selects an identity based on the recipients list when sending an email
The first and only download manager/accelerator built inside Firefox!
BiDi Mail UI Requires Restart
Direction control and BiDi-related charset misdetection correction
Remove Duplicate Messages (Alternate) Requires Restart
Search and remove messages which are the same as other messages in your mail folders (referred to as duplicates or dupes).
Facilitates opening multiple items from the Bookmarks Menu and various other bookmark/history related dropdown menus.
Be in control of which cross-site requests are allowed. Improve the privacy of your browsing by not letting other sites know your browsing habits. Secure yourself from Cross-Site Request Forgery (CSRF) and other attacks.
ThreadKey Requires Restart
Strike the 'T' key to sort messages by thread, strike the 'U' key to sort them unthreaded again, just like the 'G' key switches to Grouped By Sort view.
Year view Requires Restart
Year view for calendar.
A fork of PDF.js with support for SeaMonkey 2.49.x.
MinimizeToTray Reanimated Requires Restart
MinimizeToTray Reanimated is an application mainly dedicated to Thunderbird to allow its minimization in the systray in one click. It is the update of MinimizeToTray Revived, which is not maintained anymore since the recent versions of Thunderbird.
Autoplay Toggle NonRestartless Requires Restart
This extension performs the same function as Autoplay Toggle, but as a legacy overlay extension. This should work in cases where Autoplay Toggle doesn't. SeaMonkey and Pale Moon are supported.
AutoCopy_rebirth Requires Restart
Lightweight add-on that automatically copies any highlighted text to clipboard.
Speed Dial & Start Page with flexible layout for fast access to sites via visual bookmarks
ImportExportTools Requires Restart
Adds some tools to import and export folders and messages
QFO - Quick Fuck Off Requires Restart
This extension serves the purpose of providing instant access to the FOAAS web service. FOAAS (Fuck Off As A Service) provides a modern, RESTful, scalable solution to the common problem of telling people to fuck off.
ThunderBirthDay Requires Restart
Display birthdays from the Thunderbird addressbooks as events in Lightning.
Highlighter Requires Restart
Quickly highlight some text in Thunderbird message composing windows.
Join-NG Requires Restart
Join partial messages. Somewhat similar to MS Outlook Express "combine and decode".
Show contact photo and other info from Local Dir, Addressbook, LDAP, Facebook, LinkedIn, Flickr, Gravatar etc