We're calling on all EU-based Mozillians with iOS or iPadOS devices to help us monitor Apple’s new browser choice screens. Join the effort to hold Big Tech to account!

Avatar for Username

Search Support

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

This thread was archived. Please ask a new question if you need help.

Firefox hangs at random moments and uses 25% of the CPU (one core)

  • 2 replies
  • 16 have this problem
  • 1 view
  • Last reply by NielsH

NielsH
NielsH
more options

Hello,

On random websites and moments, I notice Firefox using 25%CPU. I have 4 cores. I don't know what's causing it, and it is pretty annoying. It just hangs and becomes unresponsive for about ~ 30-45 seconds. After that it happily continues without problems. It doesn't actually crash, it only hangs.

I think it's something with an extension that's causing it. I have this as well on my laptop, that has Hyperthreading. (this PC doesn't) - On the laptop it uses 13% CPU when the same issue appears.

I have Firefox 5 fully updated. Addons I use: Ghostery Adblock Plus HTTPS Everywhere WOT (Web of Trust)

I use on both computers Windows 7 Professional. One of them is English, the other Dutch. Both legal and with all updates.

I also have the Flash and Silverlight plugin, up-to-date.

If there's any other information you need please let me know. Would like to have the issue resolved :)

Thanks,

Niels

Hello, On random websites and moments, I notice Firefox using 25%CPU. I have 4 cores. I don't know what's causing it, and it is pretty annoying. It just hangs and becomes unresponsive for about ~ 30-45 seconds. After that it happily continues without problems. It doesn't actually crash, it only hangs. I think it's something with an extension that's causing it. I have this as well on my laptop, that has Hyperthreading. (this PC doesn't) - On the laptop it uses 13% CPU when the same issue appears. I have Firefox 5 fully updated. Addons I use: Ghostery Adblock Plus HTTPS Everywhere WOT (Web of Trust) I use on both computers Windows 7 Professional. One of them is English, the other Dutch. Both legal and with all updates. I also have the Flash and Silverlight plugin, up-to-date. If there's any other information you need please let me know. Would like to have the issue resolved :) Thanks, Niels

All Replies (2)

lily777
lily777
more options

I have the exact same problem you described. Have you figured out a fix for this yet? :(

NielsH
NielsH Question owner
more options

Nope - no fix yet :( I have installed a few new addons though: HTTPSEverywhere, Ghostery and NoScript. I'm not sure which one is causing it, but one of them caused the problem to drastically reduce. I have it once a month now, maybe.. Before that I had it multiple times a day.

It's probably Ghostery or Noscript fixing it, due to the things they forbid from loading :)

Niels