Purge Events Requires Restart
Purge events from Sunbird and Lightning calendars
Been2Long Requires Restart
Been2Long will remind you to get in touch with your contacts.
gContactSync Requires Restart
Synchronizes contacts & groups between Thunderbird or SeaMonkey and Google Contacts. Imports Facebook friends, contacts you follow on Twitter, and more.
Thundersomething Requires Restart
Changes the product name in various parts of Thunderbird for everlasting naming fun.
Make your Thunderbird wear a new mask every time.
UnMHT allows you to view MHT (MHTML) web archive format files, and save complete web pages, including text and graphics, into a single MHT file in Firefox/SeaMonkey.
RvrtRip Requires Restart
This add-on gathers information from the Belgium public radio station website(VRT) for searching music/festivals and radio programs.
In addition to the VRT website, it's possible to download the streams to disk so you can listen with your mp3player.
XPCOMViewer Requires Restart
XPCOMViewer is tiny tool for exploring XPCOM components.
Clean Subject Requires Restart
"Clean Subject" cleans the subject from multiple occurrences of subject prefixes such as ("Re: Re-2: Re:") and postfixes that are inserted by other clients. Words like "[SPAM]" can be cleaned as well. These prefixes can be defined in the preferences.
Tv program Requires Restart
It shows popular stations TV program in listings, alerts and bubble infos. It's only for Czech and Slovak TV stations.
Localization: sk, cs, hu, en
Unifinder Views Requires Restart
Add more views to the unifinder (event list) in Sunbird and Lightning.
Tea Timer Requires Restart
A countdown with reminder to prepare a perfect tea.
Force a LTR locale to behave as if it was a RTL locale.
Developer Assistant Requires Restart
A suite of tools for developers.
SMTP Control Requires Restart
SMTP Control is a Thunderbird Add-ons offering dynamic selection of outbond SMTP server while sending a message.
By default thunderbird offer the ability to define a list of SMTP servers. With one global default server for all email accounts or one ...
Google Contacts Requires Restart
Access to Google contacts and synchronize them with Thunderbird address books.
Look Up in Dictionary Requires Restart
Looks up a selected word in OS X's Dictionary.app
Yet Another Remove It Permanently Requires Restart
Remove elements and block content on Web pages.
Muttator Requires Restart
Make Thunderbird behave like Vim
Auto Address Cleaner Requires Restart
Removes comment, display name automatically from addresses before sending mail.
Open Addons Requires Restart
Open Add-ons window with one click.