I just started to use this really handy firefox extention. It enables you to sync your browser settings, the bookmarks, history, cookies, open tabs, etc from one compter to another. It will syncronise transparently without interupting the user experience. 

Another one recommended by one of my collegue's is FEBE (Firefox Environment Backup Extension). It will syncronise your firefox extentions between computers.

With these two put together you can keep your browser state syncronised with as many computers as you like. VeRY handy !!