1794548 - Huge memory usage: around 3gb with nly 3 tabs opened

Status: RESOLVED WORKSFORME

(Core :: Performance: General, defect)

Description

[gabriel]

Attachment: memory-report.json.gz

User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:105.0) Gecko/20100101 Firefox/105.0

Steps to reproduce:

Just opened 3 tabs: boursorama.com, a wordpress admin page and google adwords.

Actual results:

Firefox became slow because it was using a lot memory

Expected results:

Using a reasonable amount of memory

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

[Sean Feng [:sefeng211]]

Hi Gabriel, I noticed the Wappalyzer - Technology profiler extension took a decent amount of memory usage, can you try to disable this and see if things improved? You could also try a clean Firefox profile and see if this helps?

Let us know! Thanks

Comment 3

[gabriel]

Hi Sean,

Thank you for your help.

I've got a new fresh and clean install of Windows 11, so is Firefox. I've switched off Wappalyzer - Technology profiler, and with 3 tabs opened, Firefox is using around 900mo instead of around 1200 before. Then it seems it has improved things, but does 900mo of memory with only 3 tabs opened still seems to be quite a lot?

Thank you.

Comment 4

[Bas Schouten (:bas.schouten)]

(In reply to gabriel from comment #3)

Hi Sean,

Thank you for your help.

I've got a new fresh and clean install of Windows 11, so is Firefox. I've switched off Wappalyzer - Technology profiler, and with 3 tabs opened, Firefox is using around 900mo instead of around 1200 before. Then it seems it has improved things, but does 900mo of memory with only 3 tabs opened still seems to be quite a lot?

Thank you.

It depends a lot on the site. Some sites use a lot of memory so while three tabs running google.com hopefully wouldn't use 900MB.

But if we look for example at the Boursorama site, locally I see about 80MB of JavaScript objects, and another 20+MB of images. So that shouldn't quite bring you there. If I look at the memory profile you posted though, Google adwords is allocating 800MB of JavaScript. There isn't really anything the browser can do about that. If a site allocates 800MB of objects, the browser will end up using 800MB, that is expected behavior :-).