Where did you install Firefox from? Help Mozilla uncover 3rd party websites that offer problematic Firefox installation by taking part in our campaign. There will be swag, and you'll be featured in our blog if you manage to report at least 10 valid reports!

Rechercher dans l’assistance

Évitez les escroqueries à l’assistance. Nous ne vous demanderons jamais d’appeler ou d’envoyer un SMS à un numéro de téléphone ou de partager des informations personnelles. Veuillez signaler toute activité suspecte en utilisant l’option « Signaler un abus ».

Learn More

Upgraded Firefox but it now won't run because it tells me it is already running

  • 2 réponses
  • 0 a ce problème
  • 1 vue
  • Dernière réponse par Ian H

more options

Three days ago Firefox froze and wouldn't allow me to do anything. I quit and then Firefox would not open. Went back to Safari and download the latest version of Firefox, and installed it. It started by saying that Firefox was already running (it wasn't) so I forced it to quit. Installed and asked it to replace the existing version. Then I tried to run it and it told me that it was already running!!!

Short of deleting the whole application and starting again - losing bookmarks, passwords, etc. - what else can I do?



/edit: moved thread from Firefox for iOS (for iPhone/iPad) to Firefox as this both sounds like desktop version and you put in "Mac Ventura v13" in system details on right so you have macOS.

Three days ago Firefox froze and wouldn't allow me to do anything. I quit and then Firefox would not open. Went back to Safari and download the latest version of Firefox, and installed it. It started by saying that Firefox was already running (it wasn't) so I forced it to quit. Installed and asked it to replace the existing version. Then I tried to run it and it told me that it was already running!!! Short of deleting the whole application and starting again - losing bookmarks, passwords, etc. - what else can I do? /edit: moved thread from Firefox for iOS (for iPhone/iPad) to Firefox as this both sounds like desktop version and you put in "Mac Ventura v13" in system details on right so you have <b>macOS</b>.

Modifié le par James

Toutes les réponses (2)

more options

You may have to delete a lock file. I would exit Firefox before doing so.

https://support.mozilla.org/en-US/kb/Firefox-already-running-not-responding

more options

Thank you, Terry, and the issue is now resolved.

I am grateful.