Forecastfox Weather Requires Restart
Get international weather forecasts from AccuWeather.com and display them in any toolbar or statusbar with this highly customizable and unobtrusive extension.
AutoCopy Requires Restart
Select text and it's automatically copied to the clipboard. Also pastes on middle click.
infoRSS Requires Restart
Displays RSS, Atom, Twitter, parsed HTML and NNTP feed in a scrolling area in the status bar. Compatible with podcasting RSS which can be downloaded directly. It's also a good Google email notifier.
RSS Editor Requires Restart
Desktop RSS editor for casual editing of RSS 2.0...
Timestamp Requires Restart
Inserts the current date/time into a message or an input field in the browser.
Visit my Timestamp site for recent versions and news.
Looks up the definition of words on a Web page.
bioFOX Requires Restart
Bioinformatics tools on Mozilla based browsers
Tab Clicking Options Requires Restart
Select actions for various clicking events on a tab or the tab...
Foobar Controls Requires Restart
Allows you to control the Foobar2000 Mp3 player from the Firefox window...
ConQuery Requires Restart
Context searching for everyone and URL manipulation tool for advanced users...
FlashGot Mass Downloader Requires Restart
Download all the links, movies and audio clips of a page at the maximum speed with a single click, using the most popular, lightweight and reliable external download managers.
As of Firefox 33, Venkman *no longer works*, as the APIs which it needs have been removed.
Mozilla Archive Format, with MHT and Faithful Save Requires Restart
— Open web pages saved with Internet Explorer or other browsers (MHT)
— Save many tabs, video and audio reliably, in a single ZIP file (MAFF)
— Return to the original site you saved a page from, and more!
Linkification Requires Restart
Converts text links into genuine, clickable links...
StockTicker Requires Restart
Shows your favorite stocks in a customizable...
Moji Requires Restart
An integrated sidebar-dictionary for Japanese and Chinese including kanji dictionary.
Image Zoom Requires Restart
Adds zoom and rotation functionality for images...
Copy Plain Text Requires Restart
Copies text without formatting...
Open Long Url Requires Restart
Adds an option to your File menu to allow you to open long, multi-line...
BBCode Requires Restart
Adds BBCode, HTML, XHTML & Symbols formatting to the context menu for forums.