This article applies to Firefox Developer Edition. See Get community support for help with other Firefox browsers.
Firefox Developer Edition integrates all the developer tools you'll need into one package. It is the only browser dedicated to developers.
How do I switch between the Developer Edition and standard themes?
Click the menu button 
, click and choose and choose Customize… Customize Toolbar…. At the bottom of the Customize panel, click on , select a different theme and click .
Recover bookmarks and other data
Firefox Developer Edition will create a new profile to store bookmarks and other user data. See Recovering important data from an old profile for ways to copy this data from another Firefox profile.
