For the latest developer tools and features, try Firefox Developer Edition.
The latest Firefox features
Firefox Developer Edition replaces the Aurora channel in the Firefox Release Process. Like Aurora, features will land in the Developer Edition every six weeks, after they have stabilized in Nightly builds.
By using the Developer Edition, you gain access to tools and platform features at least 12 weeks before they reach the main Firefox release channel.
A distinct theme
This includes quicker access to the developer tools.
Experimental developer tools
We'll include experimental tools that aren't yet ready to ride the trains to release.
A separate profile
Firefox Developer Edition uses a separate profile from other Firefox versions installed on your machine. This means you can easily run the Developer Edition alongside your release or Beta version of Firefox.
Note: This means that the first time you start up the Developer Edition, you will see a completely uncustomized browser, with no add-ons, bookmarks, or history. You can use Firefox Sync if you want to unify your settings between the Developer Edition and other editions of Firefox.
Set up for web developers
We've set default preference values tailored for web developers. For example, chrome and remote debugging are enabled by default.