When I play a video in fullscreen, there is a strange black border that appears around the video which makes the content smaller than it would otherwise be. This border d… (läs mer)
When I play a video in fullscreen, there is a strange black border that appears around the video which makes the content smaller than it would otherwise be. This border does not display in Safari or Chrome, just in Firefox. It also occurs in every media player I've tested, including YouTube and Netflix.
Annoyingly, I can't get this to show up in a screenshot. It seems like Firefox guesses the aspect ratio or resolution wrong when it puts media in fullscreen, and it has the effect of downsizing the actual interactive part of the display. Meaning, I can't move my mouse into the border area to take a screenshot of it.
I'm on an ARM Macbook running MacOS 13.5, if that matters.
Is this a bug, and/or is there a way to fix this?