🐞 Left Side Menu Sticky Navigation not working in Firefox

Concise Description

Trying out the Sticky Navigation for the Left Side Menu and it is making the youtube page not finish loading properly when using Firefox or some Firefox based forks browser. Seems to happen only in home and subscriptions from what I can see.

Specs:
EndeavourOS
AMD 7800X3D
64GB RAM
AMD 9070 XT

If you let the page opening it starts using more and more ram

Thanks!

Browser/s

Firefox

Other Browser:

Floorp
Zen Browser

'Steps to reproduce' - Which of our features is required for the bug to happen?

Download the extension.
Enable Left Side Menu -> Sticky Navigation.
Refresh/Go to Youtube home or subscriptions page.

Since when?

I only realized it today

Does the bug still happen when you log out of YouTube?

Yes

..No? Then please paste your yt.config_.EXPERIMENT_FLAGS. Twice (With the error & Without)

No response

Are any errors or related log-messages shown in the Browser-Console? (F12)

No response

Tested as the only active extension? (incognito mode or another browser users):

Yes

Expected preferred behavior:

No response

ImprovedTube Version

No response

Your Settings (From the Extension's ⋮-Hamburger menu > Settings > Backup & reset > Export settings)

No response

Your YouTube-Document

No response

OS / Device:

EndeavourOS

Reproduce the issue by enabling Left Side Menu → Sticky Navigation in Firefox, then opening YouTube Home or Subscriptions and checking whether loading stalls or memory grows. Compare the behavior with the feature disabled and verify whether the problem is specific to Firefox or its forks. Done means those pages finish loading without continued memory growth while sticky navigation remains usable.