JavaScript & Colors

by harrison3001

69 Add-ons in this Collection

CSS Reloader by auchenberg

Rated 4 out of 5 stars 37 reviews

5,678 users

CSS Reloader is an extension that allows you to reload all the CSS of any site without you have to reload the page itself.

Legacy Test Pilot (Outdated) by Wil Clouser (clouserw)

Rated 4 out of 5 stars 71 reviews

343,838 users

The legacy Test Pilot program has been replaced, and this add-on is no longer useful. If you're interested in testing new features in Firefox please join the new program at

Stylish Developer Tool by Tim Nguyen

Rated 5 out of 5 stars 3 reviews

598 users

Manage your stylish userstyles right from the developer tools.

jQuery by Alrond

Rated 4 out of 5 stars 7 reviews

2,464 users

jQuery and jQuery UI embedded in browser

Measurer by Jitendra Joshi

Rated 4 out of 5 stars 6 reviews

2,270 users

Measurer allows to measure dimensions of the objects on html page. Press down shift for multiple measurements.

Developer Assistant by Ted Mielczarek, Gavin Sharp, others

Rated 4 out of 5 stars 46 reviews

2,664 users

A suite of tools for developers.

uc by matyr

Rated 5 out of 5 stars 19 reviews

1,293 users

A userChromeJS clone with built-in subscript/overlay loader capability.

JavaScript Terminal by Paul Rouget

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Rated 4 out of 5 stars 5 reviews

2,427 users

JavaScript Terminal for Firefox.

XML Viewer by Sarraju Varma Sagi

Rated 1 out of 5 stars 2 reviews

1,997 users

View xml data in textareas, in readable format.

SourceEditor by iDo

Rated 3 out of 5 stars 20 reviews

1,470 users

View and Edit source of HTML element...

Good Website Inspector by Stefan Seifarth

Rated 5 out of 5 stars 1 review

2,091 users

Good Website Inspector is an extended ruleset for YSLOW, a Firefox AddOn, to check source codes of HTML pages to get easy and fast hints to optimize the current page.

FireRainbow by BinaryAge, Jan Odvarko

Rated 4 out of 5 stars 44 reviews

4,265 users

Javascript syntax highlighting for Firebug

HTML Regex Data Extractor by pdah

Rated 4 out of 5 stars 12 reviews

1,249 users

A Regular Expression testing tool
Allow RegExp developer to test the regular expression on the live HTML content. Useful for those who work on crawling website data.

Dafizilla ViewSourceWith by dafizilla

Rated 4 out of 5 stars 59 reviews

5,732 users

The main goal allows users to open (and in some cases edit) page source with external applications.

XUL Gear by Ilya Kharlamov

Rated 5 out of 5 stars 14 reviews

946 users

IDE for FireFox plug-in developers and business analysts who create User Interface mock-ups. A WYSIWYG XUL editor
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