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.

High CPU usage

  • 1 reply
  • 1 has this problem
  • 1 view
  • Last reply by FredMcD

Jitanshuvora2002
Jitanshuvora2002
more options

I have ryzen 5 3400g, 16 GB dual channel ddr4 RAM,WD sn550 NVME SSD.

i never have trouble running firefox and can open right after booting up too.

but the problem i have is that after few minutes of using firefox will take up more than 50% of CPU. (which doesnt slow down firefox but heats the CPU up and makes multi tasking slower obviously)

And the unique part is if i click end task on that particular process it will end that CPU drain and firefox will still remain open without affecting any of my open tabs.

once i end task forcefully it wont happen again in that session but will happen again the next time i boot up my pc and use firefox.

In some cases it happens even if i dont open firefox and just connect the internet to my pc.

I have ryzen 5 3400g, 16 GB dual channel ddr4 RAM,WD sn550 NVME SSD. i never have trouble running firefox and can open right after booting up too. but the problem i have is that after few minutes of using firefox will take up more than 50% of CPU. (which doesnt slow down firefox but heats the CPU up and makes multi tasking slower obviously) And the unique part is if i click end task on that particular process it will end that CPU drain and firefox will still remain open without affecting any of my open tabs. once i end task forcefully it wont happen again in that session but will happen again the next time i boot up my pc and use firefox. In some cases it happens even if i dont open firefox and just connect the internet to my pc.

All Replies (1)

FredMcD
FredMcD
more options

Start Firefox using Troubleshoot(Safe) Mode {web link}

A small dialog should appear. Click Start In Troubleshoot(Safe) Mode (not Refresh). Is the problem still there?


https://support.mozilla.org/en-US/kb/firefox-slow-how-make-it-faster

https://support.mozilla.org/en-US/kb/firefox-uses-too-many-cpu-resources-how-fix

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

https://support.mozilla.org/en-US/kb/firefox-hangs-or-not-responding

https://support.mozilla.org/en-US/kb/firefox-takes-long-time-start-up

https://support.mozilla.org/en-US/kb/quick-fixes-if-your-firefox-slows-down


MemTest LAST UPDATED : 12/04/2020 Could you please run a tool from http://memtest.org/ in order to check the integrity of your RAM?

You will need a thumb or disk drive to install it on.


Do you let Windows handle the page file or did you set a fixed size ? Control Panel -> System -> Advanced -> Performance -> Settings

If you use a fixed size for the page file then try the former and let Windows handle the page file. How to determine the appropriate page file size for 64-bit versions of Windows {web link}