Google Browser Sync for Firefox is an extension that continuously synchronizes your browser settings – including bookmarks, history, persistent cookies, and saved passwords – across your computers. It also allows you to restore open tabs and windows across different machines and browser sessions.
Interesting idea, sounds like it could be useful in some instances, but I have major issues with trusting Google with all of my cookies, saved passwords, etc … maybe it’s for you though, it’s just not for me.
Wandering the Interwebs 