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.

A background firefox task uses 65% of CPU. Even when I close all tabs and windows, the whole appl. I have to force quit it. Firefox 57.0.4 (64bit) OSX10.12.6

  • 2 replies
  • 1 has this problem
  • 4 views
  • Last reply by daenenk

daenenk
daenenk
more options

A background firefox task uses 65% of CPU. Even when I close all tabs and windows, the whole appl. I have to force quit it. Firefox 57.0.4 (64bit) OSX10.12.6. This happens every day. On Windows 10, I've the same issue. Looks like a bug or an intended annoying feature. Currently, this page is the only open page in my Firefox. The foreground firefox task uses 4% CPU with 67 threads. The background firefox task uses 65% of CPU with 1 thread.

A background firefox task uses 65% of CPU. Even when I close all tabs and windows, the whole appl. I have to force quit it. Firefox 57.0.4 (64bit) OSX10.12.6. This happens every day. On Windows 10, I've the same issue. Looks like a bug or an intended annoying feature. Currently, this page is the only open page in my Firefox. The foreground firefox task uses 4% CPU with 67 threads. The background firefox task uses 65% of CPU with 1 thread.

All Replies (2)

WestEnd
WestEnd
more options

And how was your FF installed on both machine?

daenenk
daenenk Question owner
more options

As an update. Auto update is enabled. Originally I downloaded the installer; this was before the quantum release.