1882916 - Firefox consumes a lot of CPU and makes me Mac M2 hang for a good 15 seconds

Status: UNCONFIRMED

(Core :: Performance, defect)

Description

[ami.nihalani]

Attachment: memory-report.json.gz

User Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:123.0) Gecko/20100101 Firefox/123.0

Steps to reproduce:

I use firefox on my Mac M2 and twice a day or more, it just hangs for 15-30 seconds and whole machine is unusable. The CPU spike is visible on the activity monitor on the FirefoxCP Isolated Content process.

Attached the memory report after the machine resumes.

Actual results:

Machine hangs because Firefox memory spikes!

Comment 1

[BugBot [:suhaib / :marco/ :calixte]]

The Bugbug bot thinks this bug should belong to the 'Core::Widget: Cocoa' component, and is moving the bug to that component. Please correct in case you think the bot is wrong.

Comment 2

[Timothy Nikkel (:tnikkel)]

Can you correspond the pid of the content process with the spike with a pid in the memory report and thus a specific website?

Comment 3

[BugBot [:suhaib / :marco/ :calixte]]

This bug was moved into the Performance component.

:ami.nihalani, could you make sure the following information is on this bug?

• For slowness or high CPU usage, capture a profile with http://profiler.firefox.com/, upload it and share the link here.
• ✅ For memory usage issues, capture a memory dump from about:memory and attach it to this bug.
• Troubleshooting information: Go to about:support, click "Copy raw data to clipboard", paste it into a file, save it, and attach the file here.

If the requested information is already in the bug, please confirm it is recent.

Thank you.