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firefox lagging due to high cpu usage

  • 4 Antworten
  • 1 hat dieses Problem
  • 79 Aufrufe
  • Letzte Antwort von agouranga

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Hi all,

I've been having problems with firefox lagging constantly. General browsing around feels laggy - and opening new tabs pretty much causes my computer to freeze for a few seconds. During this time firefox causes the CPU to spike to 100% usage.

I've been using firefox for years on this computer with no issues. Hardware is pretty good (i7 5820k, 64GB of ram and an SSD).

So far I have tried:

  • Running in safe mode
  • Using a different profile
  • Downgrading to an older firefox
  • Changing allowed CPU cores from 8, to 4
  • Updated graphic card drivers to latest version

None of these work, and I'm getting a bit tired of the constant slow downs. Chrome works flawlessly, as does all my other software...

Any ideas?

Thanks!

Ausgewählte Lösung

Hello!

After digging into the CPU usage indepth, it turns out that it wasn't firefox at all... it was malwarebytes!

As soon as I closed MB, bam, firefox works flawlessly again.

Thanks for the help!

Diese Antwort im Kontext lesen 👍 1

Alle Antworten (4)

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Enter about:support in the URL bar and examine the Graphics section. There should be Webrender in the first row.

Hilfreich?

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Hi,

Thanks for the reply.

Yes webrender is there in the first row.

Hilfreich?

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You posted with a Firefox beta release (81).

Does this also happen with the Firefox 80 release with a new clean profile and with hardware acceleration possibly disabled ?

Hilfreich?

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Ausgewählte Lösung

Hello!

After digging into the CPU usage indepth, it turns out that it wasn't firefox at all... it was malwarebytes!

As soon as I closed MB, bam, firefox works flawlessly again.

Thanks for the help!

Geändert am von agouranga

Hilfreich?

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