I've seen a number of websites that don't like being in windowed mode on desktop, and the very occasional website that doesn't like my tablet (which has a custo

I've seen a number of websites that don't like being in windowed mode on desktop, and the very occasional website that doesn't like my tablet (which has a custom width/dp size set). I always assumed they were related to media queries that were set incorrectly, as zooming or resisting the window (or on my tablet, toggling desktop view) nearly always fixes it. Then there's the websites that have a menubar or other UI floating on top of the content it takes you to (this is far more common, and incredibly frustrating as I'm usually using either a toc or a search function and unable to see the content I'm looking for at all)