Firefox (Orange) Button > Preferences > Preferences > General > Startup <br> When Firefox starts > Choose '''Show my home page''' <br> Home page > www.google.com

You can check if you have a user.js file in the Firefox profile folder that sets the browser.sessionstore.resume_session_once pref to true. * http://kb.mozillazine.org/browser.sessionstore.resume_session_once ----- You can check for problems with the sessionstore.js and sessionstore.bak files in the Firefox Profile Folder that store session data. 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). *http://kb.mozillazine.org/Multiple_profile_files_created ---- Make sure that Firefox closes properly and that there isn't a hanging Firefox or plugin-container process left in the task manager. Use "Firefox/File > Exit" (Mac: "Firefox > Quit"; Linux: "File > Quit") to close Firefox if you are currently doing that by clicking the close X on the title bar. ----- If you do not keep changes after a restart then see: *http://kb.mozillazine.org/Preferences_not_saved