Hello, Are you trying to restore your previous session? Try go to History >> Restore Previous Session Also see: [[How do I restore my tabs from last time?]] [[Recovering important data from an old profile]] --------------------------------------------------------------------------------------------------- You can try to restore a previous version of the sessionstore.js file. *Right-click: Properties > Previous Versions *http://windows.microsoft.com/en-US/windows7/Previous-versions-of-files-frequently-asked-questions You can use this button to go to the Firefox profile folder: *Help > Troubleshooting Information > Profile Directory: Show Folder (Linux: Open Directory; Mac: Show in Finder) *http://kb.mozillazine.org/Profile_folder_-_Firefox *http://kb.mozillazine.org/Session_Restore