I swear i bookmarked it before ...

If you use Mozilla Firefox on more than one computer , you gotta use this tool. You can have your bookmarks, saved passwords, cookies, sessions in sync. Make firefox your roaming home!!!

Note from the developers
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.

Link
http://www.google.com/tools/firefox/browsersync/index.html