RSS, News and Blogging
Right Click Watch Ignore Requires Restart
Adds "Watch Thread" and "Ignore Thread" to right click context menu in Thunderbird and Seamonkey.
WikiLook Requires Restart
Leading dictionary lookup add-on. Fast, light, open source tool that define words for you without need to open new tabs or windows. Wiktionary&Wikipedia.
Ctrl or Shift or Alt + RightMouseButton click. Now with thesaurus.
70+ languages supported!
EmotiConverter Requires Restart
Post your best emoticons of the easiest and fastest way.
Gmail Manager Requires Restart
The original Gmail notifier for multiple accounts. Allows you to receive new mail notifications along with viewing account details including unread messages, saved drafts, spam messages, labels with new mail, space used, and new mail snippets.
Peachphone : virtual phone (Android/iPhone)-like to send image, video, sound, map or text by MMS, SMS or .mobi Requires Restart
Send SMS and MMS worldwide, Video from your webcam, video from Youtube, send photos, manage your contacts (Thunderbird, Outlook, MSN, Yahoo)
Email This! Requires Restart
Email This! will send your recipient the link, title, & highlighted text of the page you are viewing using GMail, Google Apps GMail, Yahoo, and Stand-Alone Mail Clients like Outlook Express, Thunderbird, & More!
MailNews Sync Requires Restart
New mailnews sync engine for Seamonkey and Thunderbird. Requires Firefox Sync extension.
LikeThePage - Facebook Like Any Page! Requires Restart
Easily share web pages you like with your friends and see how many people on Facebook like the page you are on!
Doom9 Toolbar Requires Restart
This is a navigation toolbar designed to make browsing http://forum.doom9.org/ easy for its users.
MR Tech Link Wrapper Lite Requires Restart
Wraps long links and lines to spare you from having to scroll left and right...
TwittyTunes Requires Restart
Allows to post your currently playing songs to Twitter with a click. As a bonus, you can also post the websites you're visiting, videos you're watching and more!
Forecastbar Enhanced Requires Restart
Note from Mozilla: This add-on has been discontinued. Try Forecastfox Weather instead.
Get international weather and weather forecasts with Forecastbar Enhanced.
Forumzilla Requires Restart
Forumzilla lets you read news and blog feeds in your email application. It is similar to the feed reader built into Thunderbird, but it lets you download stories into any folder in any POP, IMAP, or local account (configurable per...