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Welcome to Firefox Add-ons.
Choose from thousands of extra features and styles to make Firefox your own.Close
Speed Tweaks (SpeedyFox) No Restart
This extension provides a list to almost all the settings that you may need to alter in order to enhance Firefox's speed.
FireMath is an equation editor based on MathML, the mathematical markup language.
Find examples, FAQ, installation instructions and a discussion board at
Speed up scientific scripting! Improve your science!
Textise No Restart
Creates a text-only version of almost any web page. Great for accessibility, SEO and printing.
Allows to copy selected text as plain text by adding a 'Copy as Text' menu item to context menu.
Sharp Color Picker No Restart
A full featured color selector tool, to work with colors, and easily find the colors you want.
User-Agent Switcher No Restart
Quickly and easily switch between popular user-agent strings.
Disable Plugin & Mimetype Enumeration No Restart
Prevent sites from grabbing a list of your plugins & mime types.
Add, modify and filter the HTTP request headers sent to web servers. This addon is particularly useful for Mobile web development, HTTP testing and privacy.
Pick That Color No Restart
A simple lightweight addon for selecting any color from web pages. It copies the Hex color code of any pixel that is displayed in your browser to clipboard. Just click the color wheel button near your address bar or press 'Ctrl+Shift+z'.
JSON-formatter No Restart
Click addon's icon to quick format JSON document with tabs and new lines.
Octotree No Restart
Add-on to display GitHub code in tree format
Control what gets sent as the HTTP Referer on a per-site basis.
Save an image of a web page (including Flash content) to a file. Web page screenshots may be captured interactively or from the command line. Options allow you to control the output format (PNG or JPEG), image file name, scaling, and much more.
Yandex Wordstat Assistant No Restart
Расширение, позволяющее значительно ускорить сбор слов с помощью сервиса подбора слова Яндекс (wordstat)
iMacros for Firefox Featured
Automate Firefox. Record and replay repetitious work. If you love the Firefox web browser, but are tired of repetitive tasks like visiting the same sites every days, filling out forms, and remembering passwords, then iMacros for Firefox is the soluti...
GitHub Extension Installer No Restart
Install Browser Extensions straight from GitHub Repositories
Fast page style switcher. It adds toolbar button, context menu item and hotkey (CTRL+ALT+Z) to disable/enable styles on web pages.
Advanced Eyedropper, Color Picker, Gradient Generator and other colorful goodies...