using forums from two computers

[CaptainBusto]

... is annoying as hell.
every time i switch computers, i am logged out from the forum (which is understandable, since i am accessing it from a different ip), but when i click on "login", i am instead directed to the forum index (not logged in, obv). only way around it is either close the browser or manually go to logout.php.
im using firefox on both computers.