by decembre

39 Add-ons in this Collection

Greasemonkey by Anthony Lieuallen, Aaron Boodman, others

Rated 4 out of 5 stars 957 reviews

1,264,894 users

Customize the way a web page displays or behaves, by using small bits of JavaScript.

Stylish by Jason Barnabe

Rated 4 out of 5 stars 752 reviews

671,827 users

Restyle the web with Stylish, a user styles manager. Stylish lets you easily install themes and skins for Google, Facebook, YouTube, Orkut, and many, many other sites. You can even customize Firefox and other programs themselves.

YSlow by YSlow

Rated 3 out of 5 stars 195 reviews

99,521 users

YSlow analyzes web pages and suggests ways to improve their performance based on a set of rules for high performance web pages.
http://yslow.org is the official open source website.

Random Agent Spoofer by dbyrne

Rated 5 out of 5 stars 85 reviews

32,239 users

Rotates complete browser profiles ( from real browsers / devices ) at a user defined time interval. It includes many extra privacy enhancing options

Font Finder by Ben Dodson, Eric Caron, others

Rated 4 out of 5 stars 66 reviews

33,194 users

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.

Empty Cache Button by mvm

Rated 4 out of 5 stars 85 reviews

65,530 users

Cache clearing made easy. One click.

Rainbow Color Tools by Heather Arthur

Rated 5 out of 5 stars 94 reviews

34,240 users

Color tools for web development.

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

DOM Inspector by SeaMonkey Council

Rated 5 out of 5 stars 65 reviews

138,816 users

DOM Inspector is a tool that can be used to inspect and edit the live DOM of any web document or XUL application. The DOM can be navigated using a two-paned window displaying a variety of different views on the document and all nodes within.

Firefinder for Firebug by Robert Nyman

Rated 3 out of 5 stars 28 reviews

22,248 users

Finds HTML elements matching chosen CSS selector(s) or XPath expression

Firesizer by orev

Rated 4 out of 5 stars 126 reviews

30,198 users

Allows you to resize the window to specific dimensions.

NOTE: Users of Firefox 29 and above must install "The Addon Bar" extension to use this, as Firesizer uses the add-on bar that has been removed in Firefox 29.

Tilt 3D by Victor Porof, robcee

Rated 4 out of 5 stars 35 reviews

14,909 users

A WebGL-based 3D visualization of a webpage.

Dust-Me Selectors by brothercake

Rated 4 out of 5 stars 78 reviews

16,515 users

Dust-Me Selectors is development tool to remove unused CSS selectors.

Toggle Web Developer Toolbar by Baris Derin

Rated 5 out of 5 stars 5 reviews

14,144 users

Toggle Web Developer Toolbar has been specially designed for web developers to provide easy to use methods to toggle Web Developer toolbar so that they can preserve their browser view area when they do not use Web Developer toolbar.

View Source Chart by Jennifer Madden

Rated 5 out of 5 stars 107 reviews

14,786 users

Inspect the DOM at lightning speed.

Phoenix by pc-facile.com

Rated 4 out of 5 stars 42 reviews

3,261 users

An editor with real time syntax highlighting which allows edit, run and test CSS, HTML and JavaScript code. Phoenix will tell you how many CSS and JS files are loaded into a page, how big these are, it will let you edit, pack and de-obfuscate them.
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