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?

[BoundByHonor]

Thanks for replying, guys.

Peter: I looked at the options, and the box you speak of is unchecked, so that can't be the problem. I didn't install any extension, either. Thanks for helping, though.

SnOwBunZz: I ran Kaspersky already, and no sign of spyware or virus. Anything else you recommend? The homepage changes back to http://www.google.it/. I'm not sure why, really. I reside in Italy, so I assume that has to do with it. Thanks for helping.

I'll rep you both now.

EDIT: hobolord: Really? I'll look into that. Thanks.

2nd EDIT: Thanks to all of you. You gave correct solutions for my problem, but in the end, I think hobolord was the one that solved it. It had to do with my profile, and I just decided to uninstall Firefox along with all my personal data. Now it works again! A mod may now close this topic.