I've got Two tabs open
One with a login form (e.g. Gmail login screen)
And another (anything, e.g. New empty Tab)
On my personal computer, my (both) Gmail logins and passwords have been saved (it's a cookie, I think).
Normal behavior is, when I type the first letter in the login field (e.g. 'b' for 'bobbyTest'),
the auto-completed login name pops up.
When I click the popped up name, both login and password fields are filled in and I can click 'Log In'.
The problem is when, before typing the first 'b' letter, I close the other tab (with the little x button)
After this, typing 'b' in the login does not pop up anything.
It's been the same since FF 3.X as I can remember (I simply downloaded and installed FF, no customizations), I have FireBug plugin installed