This Collection is for Extension developer and who want to hack the mozilla.
The Web Developer extension adds various web developer tools to the browser.
The User Agent Switcher extension adds a menu and a toolbar button to switch the user agent of a browser.
As of Firefox 33, Venkman *no longer works*, as the APIs which it needs have been removed.
A suite of tools for developers.
Lets you take a peek at the files under the hood of your Firefox installation and profile...
Collections are groups of related add-ons that anyone can create and share.Explore Collections