- From My Computer navigate to C:\Documents and Settings and click on the folder that is named your windows xp user name Or hold the windows key and press the R key. I'll notice that the Run dialog pops up, now type in %appdata%
- Find the folder named Mozilla
- Click on the folder named Firefox
- Click on the folder named Profiles
- You should be in \Documents and Settings\YOURUSERNAMAE\Application Data\Mozilla\Firefox\Profiles\
- In this folder there might be more than once folder. Select the one that has the newest date modified. This should be your profile
- Find the file named sessionstore.js and delete it.