Google Browser Sync was a Mozilla Firefox extension released as freeware from Google. It debuted in Google Labs on 8 June 2006, and in June 2008 was discontinued. It allowed users of Mozilla Firefox up to versions 2.x to synchronize their web browser settings across multiple computers via the Internet.Google Browser Sync required a Google account, in which the user's cookies, saved passwords, bookmarks, browsing history, tabs, and open windows could be stored.