"Refreshing" your Firefox profile from about:support is not as scary as it sounds. :) It creates a clean profile and imports your old profile's bookmarks, passw

"Refreshing" your Firefox profile from about:support is not as scary as it sounds. :) It creates a clean profile and imports your old profile's bookmarks, passwords, and browsing history. You just lose any settings tweaks and old add-ons you had. Your old profile directory is also backed up in case something goes wrong during the new profile import.