Bugzilla

(In reply to Ksenia Berezina [:ksenia] from comment #1)
> I can't reproduce on my machine.

I can't reproduce either, FWIW (in Firefox Nightly on Linux, Windows 10, or Windows 11).  Reporter, can you still repro?

(Note: I can artificially *cause* something like the issue shown in the screencast if I use devtools to increase the height of `<div id="root">` in the DOM -- that makes it trigger a scrollbar in the top-level viewport, separate from its own viewport.  Maybe when this was reported, the site had a bug where that element occasionally was too tall in some cases, which manifested as a Firefox-only issue for some reason?)

(In reply to Ksenia Berezina [:ksenia] from comment #1)
> I can't reproduce on my machine.

I can't reproduce either, FWIW (in Firefox Nightly on Linux, Windows 10, or Windows 11).  Reporter, can you still repro?

(Note: I can artificially *cause* something like the issue shown in the screencast if I use devtools to increase the height of `<div id="root">` in the DOM -- that makes it trigger a scrollbar in the top-level viewport, separate from its own viewport.  This happens in Firefox as well as Chrome, and it's to-be-expected.   Maybe when this bug was reported, the site had a subtle issue where that element occasionally was too tall in some cases, only in Firefox, for some reason?)

(In reply to Ksenia Berezina [:ksenia] from comment #1)
> I can't reproduce on my machine.

I can't reproduce either, FWIW (in Firefox Nightly on Linux, Windows 10, or Windows 11).  Reporter, can you still repro?

(Note: I can artificially *cause* something like the issue shown in the screencast if I use devtools to increase the height of `<div id="root">` in the DOM -- that makes it trigger a scrollbar in the top-level viewport, separate from its own intended scrollbar.  This happens in Firefox as well as Chrome, and it's to-be-expected.   Maybe when this bug was reported, the site had a subtle issue where that element occasionally was too tall in some cases, only in Firefox, for some reason?)