1949721 - Firefox uses too much ram

Status: UNCONFIRMED

(Core :: Performance: General, defect)

Description

[Tai Le]

Attachment: memory-report.json.gz

User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/133.0.0.0 Safari/537.36

Steps to reproduce:

Firefox uses too much ram.

After I updated Window 11 24H2, Firefox used too much RAM. Please view attached file memory report for details and fix this one.
My RAM is 64GB., when i use Firefox the RAM usually over 50GB and the video on Firefox lag and slow.

Actual results:

Firefox uses too much ram.

Expected results:

Improve this bug.

Comment 1

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

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

Comment 2

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

This bug was moved into the Performance component.

:tailevn, 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.

Comment 3

[Tai Le]

Attachment: Copy raw data to clipboard.txt

I attached 'Copy raw data to clipboard'

Comment 4

[Arles]

Attachment: memory-report

Comment 5

[Arles]

Attachment: Firefox on fresh start

Comment 6

[Arles]

Attachment: Firefox with 1200KB of PDFs.png