Also, slightly unrelated, but starting Firefox 130, we'll display the size of the viewport on reload, which might help (https://bugzilla.mozilla.org/show_bug.cgi?id=1826409)
Hello UFO, it's a bit hard to help without being able to see the code for this.Is it possible to share a link/the project so we can check? if not, maybe you could build a simple case which reproduces the issue (for example on codepen?)Are you using a...