Web Developer
The Web Developer extension adds various web developer tools to a browser. The extension is available for Chrome, Firefox and Opera, and will run on any platform that these browsers support including Windows, OS X and Linux.
Download for Chrome
Version 0.4.6
May 23, 2014 Release notes
Download for Firefox
Version 1.2.5
April 29, 2013 Release notes
Download for Opera
Version 0.2
May 23, 2014 Release notes
If you are having problems installing the extension please read the help.
Supported by BrowserStack.