This site will have limited functionality while we undergo maintenance to improve your experience. If an article doesn't solve your issue and you want to ask a question, we have our support community waiting to help you at @FirefoxSupport on Twitter and/r/firefox on Reddit.

Avatar for Username

Buscar en Ayuda

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

Este tema ha sido archivado. Haz una nueva pregunta si necesitas ayuda.

FireFox taking lots of CPU and moderate lag (not just typing)

  • 7 respuestas
  • 0 tienen este problema
  • 4 visitas
  • Última respuesta de jonzn4SUSE

bitterstrawberries211
bitterstrawberries211
more options

I have tried fixing the config settings, I have tried uninstalling and reinstalling. I don't have any applications anymore (not even a background), and I have deleted and got rid of cache, history, etc.

But it still keeps lagging for me to the point that its hard to even use it now. I checked the task manager and even with just 1 new tab open, it was using 80% CPU. I changed the settings on it for the hardware like other replies said to do, and it still won't stop lagging.

It works perfectly in troubleshoot mode, but as soon as its gone, even when all the extensions and add-ons are removed, there's still a ton of lag. My computer is an Acer Nitro 5, I literally got it last year. Firefox was working up until 2 days ago just fine!

I can't seem to figure out the cause of it

I have tried fixing the config settings, I have tried uninstalling and reinstalling. I don't have any applications anymore (not even a background), and I have deleted and got rid of cache, history, etc. But it still keeps lagging for me to the point that its hard to even use it now. I checked the task manager and even with just 1 new tab open, it was using 80% CPU. I changed the settings on it for the hardware like other replies said to do, and it still won't stop lagging. It works perfectly in troubleshoot mode, but as soon as its gone, even when all the extensions and add-ons are removed, there's still a ton of lag. My computer is an Acer Nitro 5, I literally got it last year. Firefox was working up until 2 days ago just fine! I can't seem to figure out the cause of it

Todas las respuestas (7)

AzZA
AzZA
more options

see if your drivers are up to date or maybe your driver might be uninstalled

Terry
Terry
more options

This link may help.

https://support.mozilla.org/en-US/kb/diagnose-firefox-issues-using-troubleshoot-mode#w_the-problem-does-not-happen-in-troubleshoot-mode

bitterstrawberries211
bitterstrawberries211 Autor de la pregunta
more options

AzZA said
see if your drivers are up to date or maybe your driver might be uninstalled

I checked the drivers now, it did lower the CPU usage (now it hovers around 70, but I've seen it as low as 55), but the lag is still there. I checked manually too whether there are drivers that need installed, nothing.

bitterstrawberries211
bitterstrawberries211 Autor de la pregunta
more options

Terry said
This link may help. https://support.mozilla.org/en-US/kb/diagnose-firefox-issues-using-troubleshoot-mode#w_the-problem-does-not-happen-in-troubleshoot-mode

I used the guide, but it didn't work. I don't have anymore extensions or add-ons, I tried refreshing firefox. Everything is up to date. So I'm very confused

jonzn4SUSE
jonzn4SUSE
  • Top 10 Contributor
more options

What security software are you running?

bitterstrawberries211
bitterstrawberries211 Autor de la pregunta
more options

jonzn4SUSE said
What security software are you running?

Windows Defender.

jonzn4SUSE
jonzn4SUSE
  • Top 10 Contributor
more options

If you have Windows Pro, try this option. https://www.howtogeek.com/399290/how-to-use-windows-10s-new-sandbox-to-safely-test-apps/ If not, download a vm app of your choice and see what happens. Also suggest getting a better understanding of what's running when your computer boots up. Use these tool to see if something is running that shouldn't be.

https://learn.microsoft.com/en-us/sysinternals/downloads/process-explorer https://learn.microsoft.com/en-us/sysinternals/downloads/autoruns

Modificadas por jonzn4SUSE el