LastPass for Firefox Portable discontinued

Just wanted to let everyone know that LastPass has discontinued the add-on for Firefox Portable. Problem is, that the add-on doesn't connect to the safe anymore after typing in the master-password! It's now only working with the installed version of Firefox. In my case it doesn't make any sense to continue using this browser now. Is there an alternative password manager that works as easy as LastPass and that works with the portable version of Firefox, Chrome, etc.?