https://support.mozilla.org/en-US/kb/how-run-firefox-when-profile-missing-inaccessible http://kb.mozillazine.org/Profile_folder_-_Firefox#Navigating_to_the_profile_folder https://support.mozilla.org/en-US/kb/profile-manager-create-and-remove-firefox-profiles https://support.mozilla.org/en-US/kb/back-and-restore-information-firefox-profiles https://support.mozilla.org/en-US/kb/recover-user-data-missing-after-firefox-update

''<p>foxmark1935 [[#question-1366161|said]]</p>'' <blockquote>{Posted before. I know how to run firefox.exe-p to fix profile problem, but it won't run. How can I start Firefox or run firefox.exe-p when it can't find any profile? </blockquote> You should put a space between the exe and the -P or better yet, use the full path in the Windows Run dialog (hold down the Windows key and tap the R key): "C:\Program Files\Mozilla Firefox\firefox.exe" -P If your Firefox is installed under the 32-bit programs path, that would be: "C:\Program Files (x86)\Mozilla Firefox\firefox.exe" -P