This is an error message I’ve got today when I wanted to open up my Gmail account. It seams that this Firefox (it not happens in Internet Explorer) problem appear for yahoo email and other email providers also. I’ve tried to open my email account even direct from Gtalk but I’ve got the same Firefox error message.
“Firefox has detected that the server is redirecting the request for this address in a way that will never complete.
* This problem can sometimes be caused by disabling or refusing to accept
As it says, there is a big chance the problem is cause because a cookie, so, everything you should do is to clear some cookies. I recommend only to delete the cookies from the page you want to open, otherwise you’ll lose login information for other websites too.
Still if you have saved the username / password for your Gmail account in Firefox you won’t be loosing the login details.
To delete these cookies in Firefox go to Tools – Options – Privacy – Show Cookies and finding the cookie for Gmail or Yahoo / other email are you using and click on Remove Cookies. Now go open again the email. It should work now.