In windows 7, firefox 4.0.1, How do you close tabs so they don't open every time I open firefox?

Can't close tabs so they don't open every time I open Firefox.

It is possible that there is a problem with the files sessionstore.js and sessionstore.bak in the Firefox Profile Folder.
Delete the sessionstore.js file and possible sessionstore-##.js files with a number and sessionstore.bak in the Firefox Profile Folder.
*Help > Troubleshooting Information > Profile Directory: Open Containing Folder
*http://kb.mozillazine.org/Profile_folder_-_Firefox
Deleting sessionstore.js will cause App Tabs and Tab Groups and open and closed (undo) tabs to get lost, so you will have to create them again (make a note or bookmark them).
See also:
*http://kb.mozillazine.org/Session_Restore
*http://kb.mozillazine.org/sessionstore.js
*http://kb.mozillazine.org/Multiple_profile_files_created

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