[contemplator]

Hmmmm .... this is just dumb, ofcourse Firefox ( or any other programs ) must save somewhere it's preferences. This is what this is, it's not a privacy issue.

This is the sort of thing, which if it must be tracked, should be stored in the users profile itself, not in the settings for the software. For geeks that would be the HKEY\Current User (Specifically their ntuser.dat) and not under the HKEY\Local Machine. It's a simple enough fix, and surprising that Firefox let it slip through.

[Senator Bedfellow]

This is the sort of thing, which if it must be tracked, should be stored in the users profile itself, not in the settings for the software.

Actually, it is stored in the user's profile. If you look down through the comments, you see that the original reporter installed FF on a single-user machine, so it created a single profile in a globally accessible location. Then, afterwards, the user created separate login accounts for Windows. Except that they didn't create separate FF profiles, so naturally FF continued using the only profile it knew about. The moral is, if you convert from a single-user machine to one with multiple accounts, either manually create separate browser profiles, or uninstall and reinstall to allow them to be created automatically. This is probably not a common situation, and I'm not sure it's really fair to describe it as a legitimate browser bug - the browser did exactly what they originally told it to do, in using a single profile, and then they apparently wanted it to read their minds and psychically know that it was time to start using multiple profiles.

Or, maybe the moral is, stick to free porn sites that don't require a login :)