As soon as FireFox 5.whatever updated to FireFox 6.0 I lost access to my yahoo.com eMail on firefox. All I get when the link is clicked is a "bad request" page. FIX THIS!
The details are in the above question.
This issue can be caused by corrupted cookies.
Clear the cache and the cookies from sites that cause problems.
"Clear the Cache":
- Tools > Options > Advanced > Network > Offline Storage (Cache): "Clear Now"
"Remove Cookies" from sites causing problems:
- Tools > Options > Privacy > Cookies: "Show Cookies"