You can restore your browser settings in Chrome at any time.You might need to do this if apps or extensions that you installed changed your settings without your knowledge.When that happens, some of your add-ons may stop working.
Your saved bookmarks and passwords won't be cleared or changed. For example, some settings like fonts or accessibility won't be deleted.
To create a new user profile, add a new user in Chrome.
Developer Preview editions of the Firefox OS phone are now becoming widely available to the community, mainly through Geeksphone.
Since these are for developers, naturally we want to encourage you to tinker and play with them as much as possible!
If Firefox closes unexpectedly, or if an error dialog appears and Firefox closes, see Firefox crashes.