adev is broken on Firefox after xtermjs is loaded and table of contents item clicked

[lukasmatta]

Which @angular/* package(s) are the source of the bug?

Don't known / other

Is this a regression?

No

Description

How to reproduce:

1. Go to https://angular.dev using Firefox
2. Go to page that loads xtermjs (either https://angular.dev/playground or scroll down on the landing page)
3. Go to Docs -> click on any item in the "On this page" section on the right
4. Left sidebar is not visible anymore.

Repro video:
https://drive.google.com/file/d/12GHRIDE3GidLv_kASuid0cA0I9euEu2v/view

xtermjs seems to be inserting absolutely positioned elements that affect viewport width in Firefox.

Related to xtermjs/xterm.js#4805

Please provide a link to a minimal reproduction of the bug

No response

Please provide the exception or error you saw

No response

Please provide the environment you discovered this bug in (run ng version)

Firefox 123.0.1 on macOs 14.3.1

Anything else?

No response

[JeanMeche]

Hi, we appreciate you took the time to investigate the issue.
#54897 will land the fix.

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