If Firefox fails to start with your recent profile and says Firefox is already running you can try to delete lock from your default profile to recover it: If it doesn't, you can copy your data to the new profile - see Recovering important data from an old profile for instructions. Test to see if your problem occurs with the new profile.

Click on the newly created profile in the Profile Manager and click Start Firefox.To create the new profile, click Finish.This name is not exposed on the Internet. Use a profile name that is descriptive, such as your personal name. Click Next and enter the name of the profile.To start the Create Profile Wizard, click Create Profile.Close all instances of Firefox or restart the computer and then try again. If the Profile Manager window does not open, Firefox may have been running in the background, even though it was not visible.In Terminal run: firefox -ProfileManager -no-remote.To close Firefox, at the top of the Firefox window, select the File menu, and then select Quit. Important: Before you can start the Profile Manager, Firefox must be completely closed. You can try to make a new profile test whether that solves the problem, and if so, copy your data (bookmarks, saved passwords, etc.) to the new profile. If the steps above don't fix your problem, continue by following these instructions.Ī corrupt profile can cause various problems with Firefox.

If you see any running instances please reboot your computer (or use kill/killall command).įirefox -safe-mode Test Firefox with a new profile Should not print any output as it reports PID of running Firefox instances. Make sure no Firefox instance is running.Safe mode can be used to start Firefox in basic safe configuration. Sudo dnf install firefox Run in safe mode If there's something printed please re-install Firefox by rpm/dnf on terminal as: If Firefox installation is correct you don't get any output. Then restart your computer and start Firefox again. Standard troubleshooting steps Restart FirefoxĬlose Firefox completely: From the menu at the top of the Firefox windowbar, select File and then select the Quit menu item. 1.16 Get system log after system freeze / restart.1.15 Testing different Wayland compositor.1.11 Collect information for a bug report.1.8 Check WebRender state (Hardware acceleration).1.2 Verify Firefox installation integrity.

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