My Firefox window used to be about 3/4 of my screen width but after crashung and restarting is now full screen width. How do I get the Firefox window back to 3/4 screen width?

This can be a problem with the file [http://kb.mozillazine.org/localstore.rdf localstore.rdf] in the [http://kb.mozillazine.org/Profile_folder_-_Firefox Profile Folder]. Delete localstore.rdf or rename the file to localstore.rdf.sav in the [http://kb.mozillazine.org/Profile_folder_-_Firefox Profile Folder] to test if the file is corrupted.<br /> See http://kb.mozillazine.org/Corrupt_localstore.rdf<br /> (caution: do not delete the localstore.rdf file in the Firefox program installation folder)