Join the Mozilla’s Test Days event from 9–15 Jan to test the new Firefox address bar on Firefox Beta 135 and get a chance to win Mozilla swag vouchers! 🎁

Ce site disposera de fonctionnalités limitées pendant que nous effectuons des opérations de maintenance en vue de vous proposer un meilleur service. Si un article ne règle pas votre problème et que vous souhaitez poser une question, notre communauté d’assistance est prête à vous répondre via @FirefoxSupport sur Twitter, et /r/firefox sur Reddit.

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 ».

En savoir plus

Firefox is not even opened, but its process is slowing my computer

  • 2 réponses
  • 1 a ce problème
  • 1 vue
  • Dernière réponse par rouvenster

more options

Hello, I have no issue with the browser itself, very fast and smooth. I open it with no error message, close it, no problem. But several times while troubleshooting for something not related at all, I discover several processes firefox.exe (something like 5 or 6) running in the task manager while the browser itself is closed. Today was even more crazy, as I was playing GTA V, I noticed big lags with no apparent reasons. I checked the task manager, and discovered that Firefox.exe (browser not even opened) used 5 times more CPU resources than GTA V. Could it be some kind of a virus using a fake process name for mining or something similar ? Just seems too crazy to be the actual Firefox browser doing heavy work while being closed. Screenshot below CPU is Ryzen 5 5600X Thanks for the help

Hello, I have no issue with the browser itself, very fast and smooth. I open it with no error message, close it, no problem. But several times while troubleshooting for something not related at all, I discover several processes firefox.exe (something like 5 or 6) running in the task manager while the browser itself is closed. Today was even more crazy, as I was playing GTA V, I noticed big lags with no apparent reasons. I checked the task manager, and discovered that Firefox.exe (browser not even opened) used 5 times more CPU resources than GTA V. Could it be some kind of a virus using a fake process name for mining or something similar ? Just seems too crazy to be the actual Firefox browser doing heavy work while being closed. Screenshot below CPU is Ryzen 5 5600X Thanks for the help
Captures d’écran jointes

Solution choisie

I tried every options recommended to me, it didn't help. So I uninstalled Firefox, wiped stuff and cleaned the registry using Ccleaner, and reinstalled it using chocolatey. Now, when I click the "X" on the top right side, i can see on the task manager the processes closing immediately. I guess it is solved now, just a shame I didn't know what caused it. Hope it won't come back

    • EDIT**

It came Back. Permanently removed Firefox and using Edge instead with the exact same settings and extensions. In Edge settings, there is a switch to turn off saying "Let processes and extensions run even when Edge is closed". I wish there was the same thing in Firefox.

Lire cette réponse dans son contexte 👍 0

Toutes les réponses (2)

more options

Hey there!

Please see te following link on how you can reduce the amount of CPU resources Firefox takes:

https://support.mozilla.org/en-US/kb/firefox-uses-too-much-memory-or-cpu-resources

Hope I helped!

Kind regards,

Bithiah

more options

Solution choisie

I tried every options recommended to me, it didn't help. So I uninstalled Firefox, wiped stuff and cleaned the registry using Ccleaner, and reinstalled it using chocolatey. Now, when I click the "X" on the top right side, i can see on the task manager the processes closing immediately. I guess it is solved now, just a shame I didn't know what caused it. Hope it won't come back

    • EDIT**

It came Back. Permanently removed Firefox and using Edge instead with the exact same settings and extensions. In Edge settings, there is a switch to turn off saying "Let processes and extensions run even when Edge is closed". I wish there was the same thing in Firefox.

Modifié le par rouvenster