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Context Font

Show the font of selected text in the context menu.

Rated 4 out of 5 stars (12)
3,448 users

Gmail

Gmail in just 1 click.enjoy

Rated 4 out of 5 stars (2)
5,288 users

Rainbowpicker

Pick any color of the...

Rated 4 out of 5 stars (15)
1,106 users

JavaScript Deobfuscator No Restart

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 4 out of 5 stars (19)
54,897 users

Save Complete

Saves a webpage completely, providing a better alternative to the flawed built-in save functionality of Firefox.

Rated 4 out of 5 stars (66)
2,325 users

Header Tool

Open in a sidebar or in a tab and write headers directly. Simplicity, JS substitution, built-in functions, encryption, and regexp support.
You can easy modify header on each HTTP call on the Mozilla Firefox.

Rated 4 out of 5 stars (9)
3,179 users

FireRainbow

Javascript syntax highlighting for Firebug

Rated 4 out of 5 stars (40)
9,865 users

Website City + Country Info

Shows the city (!) and the countryflag of the website you are browsing to. See IP, provider, Oranisation name, GEO coordinates and further useful infos for security, fun and SEO reasons.

Rated 4 out of 5 stars (20)
3,385 users

CSS Usage

Firebug extension to view which CSS rules are actually used.

Rated 4 out of 5 stars (36)
27,288 users

ViewStatePeeker

This add-on can decode and show viewstate contents of an *.aspx page. Once you intall this add-on, it shows up a 'Show Viewstate' item in context menu of Firefox. When this menuitem is clicked, a popup comes up showing the viewstate details.

Rated 4 out of 5 stars (5)
1,112 users

PageDiff

Pagediff is a simple page compare application. It helps web developers and designers to see HTML-code(text) differences between web pages...
One can visit my site to download new version(new versions before release)

Rated 4 out of 5 stars (15)
1,749 users

Header Spy

Shows HTTP headers on statusbar.

Rated 4 out of 5 stars (16)
6,735 users

Launchy

Launchy will enable you to open links and mailto's with external applications...

Rated 3 out of 5 stars (71)
6,738 users

Selenium IDE: Implicit Wait

This plugin allows Selenium IDE to automatically wait until the element is found before executing each command using a locator. It is equivalent to the implicit wait function available with Selenium 2 WebDrivers.

Rated 1 out of 5 stars (1)
2,608 users

Cookie Exporter

Exports all cookies in IE manner.
Makes a Netscape standard cookies.txt file.
Very useful for WGET --load-cookies option.

Rated 5 out of 5 stars (8)
3,134 users

View Cookies

It adds a tab to the Page Info dialog box, which shows the cookies belonging to the current page.

Rated 4 out of 5 stars (38)
27,083 users

Selenium Expert (Selenium IDE)

This plugin is my attempt to bring the wonderful world of inspections, tips, hints, fixes and refactoring to Selenese! The Selenium Expert goes through your selenium test cases suggesting improvements, giving tips and even lets you apply them.

Rated 5 out of 5 stars (1)
22,973 users

View Source Chart

Inspect the DOM at lightning speed.

Rated 5 out of 5 stars (98)
20,305 users

Stylish-Custom

abandoned, use Stylish Custom Add-on instead
http://forum.userstyles.org/discussion/37939/stylish-custom-add-on/p1

custom additions to Stylish extension.
brings back features from 0.5.9 and adds new features

Rated 4 out of 5 stars (35)
3,662 users

Power Debugger (Selenium IDE)

A plugin for Selenium-IDE to improve debugging and troubleshooting issues with scripts

Rated 5 out of 5 stars (2)
4,877 users