RSS, News and Blogging
YouTube Flash Video Player is a powerful tool that will let you choose Flash video player as default YouTube video player.
Screengrab (fix version) Requires Restart
Screengrab! saves webpages as images.
New features: upload to internet
Full Web Page Screenshots (♥♥♥♥♥) Requires Restart
FireShot makes full web page screenshots. Demo: http://bit.ly/RlBQMV
Screenshots can be quickly captured and:
― Saved as Image or PDF
― Sent to clipboard
― Annotated *
― Uploaded *
― E-Mailed *
* OS Windows only
S3.Google Translator Requires Restart
S3.Google Translator adds the power of Google Translate’s automatic translations to your browser!
It supports translation of selected text, entered phrase or whole webpage between any of 80+ languages.
New Feature: Language learning!
EmotiConverter Requires Restart
Post your best emoticons of the easiest and fastest way.
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!
Fetch Text URL (fix version) Requires Restart
Open text URLs from the context menu.
eQuakeAlert! Requires Restart
Have you ever thought of getting alerts on land disasters like earthquakes, right on your desktop? eQuakeAlert! is the solution for that!
AutoPager Requires Restart
AutoPager automatically loads next pages when you reach the end of a page. It works on a ton of sites,Google,Yahoo..
It works well with most other add-ons adblock plus, WOT and most of the greasemonkey scripts.
You can also try AutoPagerLite.
Gmail Mail Sidebar brings Gmail right into your Firefox Sidebar.
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!
Display Mail User Agent Requires Restart
Displays icon for user agent of received mails.
ReminderFox Requires Restart Featured
ReminderFox displays and manages lists of reminders and ToDo's. ReminderFox makes sure you remember all of your important dates via easy-to-use lists, alerts, and alarms, right in your browser without the need for a separate calendar program.
Copy Pure Text Requires Restart
Allows to copy selected text as plain text by adding a 'Copy as Text' menu item to context menu.
NewsFox Requires Restart Featured
NewsFox is an efficient 3-pane(email) style Atom/RSS feed reader.
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!
QuoteCollapse Requires Restart
Collapse and expand quotes. Please see the extension homepage for further information.
Note that MozDev has shut down long ago (mailing list etc). Add-On homepage, source code and issue tracker are on GitHub, as linked on this page.
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.
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!