don't arrange yahoo mail to your firefox homepage, tweak it like this, well for homepage settings : display my homepage, and fill in my homepage bar as this: about:blank , and then, bookmark yahoo mail login page, when you use yahoo mails, go through your bookmarks, just simple clicks you know.

I probably wasn't very clear in my original question: I would like Yahoo! Mail to be my homepage. This was my homepage when I used Firefox 3.X and it worked fine. When I upgraded to Firefox 4.0, this no longer worked. How would I set my homepage to Yahoo! Mail again? Please note it is already listed as my homepage in the Tools/Options/Homepage - how do I get Yahoo! Mail to automatically appear when I open Firefox again?

It is possible that there is problem with the files sessionstore.js and sessionstore.bak in the Profile Folder

Delete sessionstore.js and sessionstore.bak in the Profile Folder

• Help > Troubleshooting Information > Profile Directory: Open Containing Folder

If you see files sessionstore-##.js with a number in the left part of the name like sessionstore-1.js then delete those as well.

You will have to redo App Tabs and Tab Groups after deleting sessionstore.js.

See:

• http://kb.mozillazine.org/Session_Restore

Thank you, cor-el! I deleted all of the sessionstore files and that worked. Thanks for your help...much appreciated!

You're welcome