This started happening only after I installed firefox 3.5 on my winxp laptop. Each time I close and open my browser I have to relogin to google (ensuring that stay signed in) is checked. Was some default setting changed in FF 3.5 or have I changed something. Please help. Thanks.
Do you have any add-ons installed that interfere or interact with cookies?
Also, is your system time correct?
Lastly, click Tools > Options, and under Privacy, there is a option saying ...
Firefox Will :... (Make sure it says "Remember History"
I had this same problem when I used a GMail notifier add-on. All of the notifier add ons I tried did this. I ended up using either Digsby, Trillian or the GMail Notifier from Google to get around this. I've settled on the GMail notifier.