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Remote XUL Manager No Restart

Manages the Remote XUL whitelist to allow websites and local files to load XUL content.

Rated 5 out of 5 stars (34)
2,532 weekly downloads

Poster

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 (61)
2,516 weekly downloads

FlashFirebug

Debug Flash/SWF files on the web. Edit properties and inspect elements on the fly. View log output inside the extension. Run AS3 code against the active SWF. Access assets with the Explorer. View AMF calls and Shared Objects and much much more...

Rated 4 out of 5 stars (5)
2,505 weekly downloads

RequestPolicy Featured

Be in control of which cross-site requests are allowed. Improve the privacy of your browsing by not letting other sites know your browsing habits. Secure yourself from Cross-Site Request Forgery (CSRF) and other attacks.

Rated 4 out of 5 stars (224)
2,482 weekly downloads

Empty Cache Button Featured

Cache clearing made easy. One click.

Rated 4 out of 5 stars (84)
2,475 weekly downloads

SEO Toolbar by Moz

Access important SEO metrics while you surf the web. This toolbar from Moz lets you see metrics like Domain Authority and Page Authority for every page you visit, analyze links as you browse, expose page elements, and access other SEO tools.

Rated 4 out of 5 stars (36)
2,457 weekly downloads

Favorites (Selenium IDE)

A plugin for Selenium-IDE to have favorite test suites and open and execute the test suites with a single click

Rated 4 out of 5 stars (3)
2,410 weekly downloads

XPath Checker

An interactive editor for XPath expressions.

Rated 5 out of 5 stars (18)
2,384 weekly downloads

Pearl Crescent Page Saver Basic 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 (77)
2,306 weekly downloads

CacheViewer

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

Rated 4 out of 5 stars (218)
2,286 weekly downloads

Rainbow Color Tools Featured

Color tools for web development.

Color picker and eyedropper + saving colors and trying out colors with drag and drop.

Rated 5 out of 5 stars (93)
2,252 weekly downloads

Quick Locale Switcher

Allows you to quickly switch to a different language (User Interface, Spell Checker Dictionary and Website content) in your Mozilla application.

Rated 3 out of 5 stars (81)
2,043 weekly downloads

Clear Console 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 (59)
2,025 weekly downloads

Flashlight

A debug tool for Flash developers enabling switching between Flash player versions and basic debug log viewing.

Flash icon from PraX-08's Qure CS4 icon set.

Rated 5 out of 5 stars (11)
2,017 weekly downloads

about:addons-memory No Restart

Adds an about:addons-memory page that details add-on memory usage

Rated 4 out of 5 stars (85)
2,001 weekly downloads

Font Finder 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 (65)
1,999 weekly downloads

FlashDisable No Restart

Toolbar button that lets you disable and re-enable Flash with just one click.

Rated 5 out of 5 stars (41)
1,979 weekly downloads

RefControl

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

Rated 4 out of 5 stars (178)
1,912 weekly downloads

JS Print Setup

Client side Javascript printer settings.
This extension implements print setup from CS Javascript, similar of MeadCo's ScriptX ActiveX control for Internet Explorer.

Rated 5 out of 5 stars (21)
1,882 weekly downloads

Classic Toolbar Buttons No Restart 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 (141)
1,839 weekly downloads