Web Development

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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.

Rated 5 out of 5 stars (1)
3,042 users

FireMath

FireMath is an equation editor based on MathML, the mathematical markup language.

Find examples, FAQ, installation instructions and a discussion board at
http://www.firemath.info

Speed up scientific scripting! Improve your science!

Rated 4 out of 5 stars (10)
3,943 users

Textise No Restart

Creates a text-only version of almost any web page. Great for accessibility, SEO and printing.

Rated 3 out of 5 stars (19)
3,976 users

Copy Pure Text

Allows to copy selected text as plain text by adding a 'Copy as Text' menu item to context menu.

Rated 4 out of 5 stars (15)
5,288 users

Sharp Color Picker No Restart

A full featured color selector tool, to work with colors, and easily find the colors you want.

Not yet rated
1,480 users

MozRepl

Interactive Javascript Console for Mozilla Applications Developers

Rated 4 out of 5 stars (11)
49,354 users

User-Agent Switcher No Restart

Quickly and easily switch between popular user-agent strings.

Rated 4 out of 5 stars (6)
20,685 users

Disable Plugin & Mimetype Enumeration No Restart

Prevent sites from grabbing a list of your plugins & mime types.

Rated 4 out of 5 stars (11)
1,866 users

Modify Headers

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.

Rated 4 out of 5 stars (71)
225,501 users

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'.

Rated 5 out of 5 stars (2)
1,517 users

JSON-formatter No Restart

Click addon's icon to quick format JSON document with tabs and new lines.

Not yet rated
3,137 users

Octotree No Restart

Add-on to display GitHub code in tree format

Rated 5 out of 5 stars (7)
1,138 users

RefControl

Control what gets sent as the HTTP Referer on a per-site basis.

Rated 4 out of 5 stars (179)
81,392 users

Pearl Crescent Page Saver screenshot tool

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.

Rated 4 out of 5 stars (78)
92,730 users

Yandex Wordstat Assistant No Restart

Расширение, позволяющее значительно ускорить сбор слов с помощью сервиса подбора слова Яндекс (wordstat)

Rated 5 out of 5 stars (1)
1,687 users

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...

Rated 4 out of 5 stars (377)
422,694 users

GitHub Extension Installer No Restart

Install Browser Extensions straight from GitHub Repositories

Rated 5 out of 5 stars (8)
2,542 users

Read Easily

Fast page style switcher. It adds toolbar button, context menu item and hotkey (CTRL+ALT+Z) to disable/enable styles on web pages.

Rated 5 out of 5 stars (20)
1,319 users

ColorZilla

Advanced Eyedropper, Color Picker, Gradient Generator and other colorful goodies...

Rated 5 out of 5 stars (302)
257,347 users

Key Manager

KeyManager Tool: Firefox Add-on for Key Generation, Certificate Enrollment, CRL Signing, and Identity and Authority Delegation

Rated 3 out of 5 stars (20)
1,077 users