I too am getting signed off randomly. Using FF 21.0. I can sign in and in about 2 minutes open a forum page and I am not signed on anymore. I still have the cookies. Im using Selfdestructing Cookies addon but troublefreepools.com is in the whitelist. I dont have any trouble out of another forum Im a member of. Its aggravating. Ive deleted all my cookies and tried it. Same thing. I would like to know if anyone solves this.