Firefox 3.6 came bundled with a new feature very useful users who tend to regularly make each one back-up the profile created on this browser (Extensions, feeds, bookmarks, themes, etc.), namely page support / troubleshooting information.
With this feature, Firefox users facilitated access to information on the browser used as well as those on settings made by each of its: version, plugins, Extensions, profile (And the folder where it is stored) bookmarks and preferences.
Access to the folder in which this information is stored greatly simplified the backup process them: Once in that folder, you can select and save in a few mouse clicks the informations you want to keep, transfer, etc., or you can create a archive the entire folder - The simplest way to store important data.