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JavaScript Toggle On and Off

Toggle JavaScript engine on and off the easy way

Rated 5 out of 5 stars (3)
2,416 weekly downloads

JavaScript Deobfuscator

This add-on shows you what JavaScript code runs on a web page, even if it is obfuscated and generated on the fly. Simply open JavaScript Deobfuscator from the Web Developer menu and watch the scripts being compiled/executed.

Rated 5 out of 5 stars (20)
2,403 weekly downloads

Poster Requires Restart

A developer tool for interacting with web services and other web resources that lets you make HTTP requests, set the entity body, and content type. This allows you to interact with web services and inspect the results...

Rated 4 out of 5 stars (62)
2,346 weekly downloads

CacheViewer Requires Restart

This extenion is GUI Front-end of "about:cache"...

Rated 4 out of 5 stars (224)
2,312 weekly downloads

XPath Checker Requires Restart

An interactive editor for XPath expressions.

Rated 5 out of 5 stars (19)
2,264 weekly downloads

Pearl Crescent Page Saver screenshot tool Requires Restart

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 (90)
2,236 weekly downloads

Remote XUL Manager

Manages the Remote XUL whitelist to allow websites and local files to load XUL content. For versions compatible with Firefox 41 and lower, see All Versions page below.

Rated 5 out of 5 stars (36)
2,086 weekly downloads

Tilt 3D Requires Restart

A WebGL-based 3D visualization of a webpage.

Rated 4 out of 5 stars (38)
2,057 weekly downloads

Classic Toolbar Buttons Featured

'Classic Toolbar Buttons' add-on restores old toolbar button ui (known from Fx 4-7s small view, Fx 4-12s large view & Tb 5-14) for current Firefox, Thunderbird and Seamonkey versions on Windows.

Beta builds on versions page!

Rated 5 out of 5 stars (150)
2,037 weekly downloads

Zawgyi-One fonts package

-Zawgyi-One script fallback fonts for Firefox (Android edition)
Addon installs Zawgyi-One font (Zawgyi-One.ttf under SIL OFL 1.1 license) that enables proper rendering of
Zawgyi-One script on all sites (Facebook, Twitter, Google, etc.),

Rated 5 out of 5 stars (2)
2,030 weekly downloads

Font Finder Requires Restart Featured

FontFinder is created for designers, developers and typographers. It allows a user to analyze the font information of any element on a page, copy any piece(s) of that information to the clipboard, and perform inline replacements to test new layouts.

Rated 4 out of 5 stars (71)
2,011 weekly downloads

Emoji Cheatsheet

A reference for the codes to generate Emojis on popular sites like GitHub or Basecamp and Unicode characters for Twitter and Facebook.
Search Emojis by name or view recently selected items. Emojis are automatically copied to the clipboard.

Rated 4 out of 5 stars (23)
1,958 weekly downloads

Html Validator Requires Restart

HTML Validator is a Mozilla extension that adds HTML validation inside Firefox and Mozilla. The number of errors of a HTML page is seen on the form of an icon

For Online HTML 5 validation, you need 0.962
http://users.skynet.be/mgueury/mozilla

Rated 4 out of 5 stars (215)
1,884 weekly downloads

FoxyProxy Basic Requires Restart

FoxyProxy Basic is a simple on/off proxy switcher. More advanced features and configuration options are offered by FoxyProxy Standard.

Rated 4 out of 5 stars (31)
1,848 weekly downloads

Clear Console Requires Restart Featured

One click to clear your cache, cookies, history, html5/local storage, http logins, all of them or restart your browser with/without notifications.

Rated 4 out of 5 stars (63)
1,810 weekly downloads

FlareGet Integration

FlareGet Browser Integration extension

Rated 4 out of 5 stars (5)
1,755 weekly downloads

Tiny JavaScript Debugger Requires Restart

TinyJSD is a JavaScript debugger for privileged code running Mozilla products like Firefox, Thunderbird, SeaMonkey. It serves to debug the application as well as extensions written in JavaScript.

Rated 4 out of 5 stars (7)
1,749 weekly downloads

FireSSH Requires Restart Featured

FireSSH is a free, cross-platform SSH terminal client for Mozilla Firefox. Written entirely in Javascript!

Rated 4 out of 5 stars (92)
1,727 weekly downloads

Edit Cookies Requires Restart

This extension is now being partly maintained by Abine http://www.abine.com/.
New version of Edit Cookies by us is here: http://abine.com/edit_cookies.php
Send us any feedback about what you want:support@getabine.com.

Rated 4 out of 5 stars (46)
1,713 weekly downloads

RefControl Requires Restart

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

Rated 4 out of 5 stars (185)
1,624 weekly downloads