I have a problem with Firefox

[BoundByHonor]

I dunno what's going on, but every time I close Firefox, everything resets. My homepage changes, and I'm logged out of all the websites in which I'm always logged in, like OnRPG, Facebook, YouTube, and Google. Does anybody know what's going on? Is it a virus?

I'll give thanks and rep to anyone willing to help, so don't feel like you won't be rewarded. Please help me.

[Peter Griffin]

Try going to Extra > Options > Privacy and check if 'Remove my private data when I reset Firefox' (something along those lines) is checked.

[SnOwBunZz]

Try going to Extra > Options > Privacy and check if 'Remove my private data when I reset Firefox' (something along those lines) is checked.

That normally shouldn't affect the homepage.
Scan for adware/spyware.

BoundByHonor, to what changes the homepage?