Tranquility Reader
Snap Links Plus
Select a number of links with a rectangle and open them in new tabs. You can also lasso checkboxes to quickly check or uncheck them. Works with radio buttons as well.
18,171 users
FoxyProxy Standard
FoxyProxy is an open-source, advanced proxy management tool that completely replaces Firefox's limited proxying capabilities. No paid accounts are necessary; bring your own proxies or buy from any vendor. The original proxy tool, since 2006.
237,461 users
Gesturefy
Navigate, operate, and browse faster with mouse gestures! A customizable mouse gesture add-on with a variety of different commands.
92,094 users
Grammar and Spell Checker - LanguageTool
With this extension you can check text with the free style and grammar checker LanguageTool. It finds many errors that a simple spell checker cannot detect, like mixing up there/their, a/an, or repeating a word.
377,660 users
Search by Image
A powerful reverse image search tool, with support for various search engines, such as Google, Bing, Yandex, Baidu and TinEye.
365,814 users
Grammar and Spell Checker - LanguageTool
With this extension you can check text with the free style and grammar checker LanguageTool. It finds many errors that a simple spell checker cannot detect, like mixing up there/their, a/an, or repeating a word.
377,660 users
Search by Image
A powerful reverse image search tool, with support for various search engines, such as Google, Bing, Yandex, Baidu and TinEye.
365,814 users
Dark Background and Light Text
Make every web page (or just the pages you want) display light text on dark backgrounds. All color variations are fully customizable.
32,846 users
LeechBlock NG
LeechBlock NG is a simple productivity tool designed to block those time-wasting sites that can suck the life out of your working day. All you need to do is specify which sites to block and when to block them.
78,063 users
SteamDB
Adds SteamDB links and new features on the Steam store and community. View lowest game prices and stats.
56,658 users
Steam URL Opener
Allows you to open URLs inside Steam Client to save the hassle of logging in normal browser (with a single click on a button).
4,619 users
DuckDuckGo Privacy Essentials
Simple and seamless privacy protection for your browser: tracker blocking, cookie protection, DuckDuckGo private search, email protection, HTTPS upgrading, and much more.
1,420,808 users
Search by Image
A powerful reverse image search tool, with support for various search engines, such as Google, Bing, Yandex, Baidu and TinEye.
365,814 users
TinEye Reverse Image Search
Click on any image on the web to search for it on TinEye. Recommended by Firefox! Discover where an image came from, see how it is being used, check if modified versions exist or locate high resolution versions. Made with love by the TinEye team.
59,407 users
Image Search Options
A customizable reverse image search tool that conveniently presents a variety of top image search engines.
43,226 users