Affected versions

• 96.0a1 (20211103093153)
• 95.0b1 (20211101163752)
• 94.0 (20211025220926)
• 93.0 (20211025220926)

Affected platforms

• macOS 10.15

Steps to reproduce

1. Open Firefox and amazon.com
2. Scroll at the bottom of the page causing elastic overscroll multiple times.
3. Observe Activity monitor.

Expected result

• No CPU increase can be seen.

Actual result

• Cpu raises when causing elastic overscroll multiple times.

Regression range

• I will search for one ASAP if there is one.

Notes

• Attached a screen recording: link.

I don't think this is a regression because I see a slight CPU increase after bug 1704231 landed as well.

Could you attach a profile as well please?

(In reply to Botond Ballo [:botond] from comment #2)

Could you attach a profile as well please?

Sure: https://share.firefox.dev/3EYDBeb. Hope it helps.

Would you mind taking another profile without screenshots? (It seems to me that a bunch of time were consumed by the screenshot stuff)

I am also wondering how much CPU is consumed on Safari (and Chrome).

(In reply to Hiroyuki Ikezoe (:hiro) from comment #4)

Would you mind taking another profile without screenshots? (It seems to me that a bunch of time were consumed by the screenshot stuff)

Sure, profiler link here: https://share.firefox.dev/3CXLXCw.

(In reply to Hiroyuki Ikezoe (:hiro) from comment #5)

I am also wondering how much CPU is consumed on Safari (and Chrome).

I think they consume as much as Firefox as can be seen in this video recording (link). When I first logged this issue I only looked at original Chrome/Safari processes but they seem to have another process that is consuming more CPU and not the original Google Chrome/ Safari. If nothing raises up from the profiler I think this can be closed. Thank you!

Thanks for confirming. The new profile result looks pretty reasonable/good. I am closing.