Since Firefox installed the most recent update May 9th, update 113.0 (20230504192738), whenever I play a video full screen from any websites including YouTube, news sites, basically anything streaming a video, the video itself is not 100% full screen as it was prior to the update yesterday. The video expands to the top of the screen, but the two side and lower borders do not expand fully and the website underneath can be seen on these sides. I attached a random YouTube video screenshot and a news channel video with dark borders to show what is happening. Again this is on all websites with video and full-screen options, not just YouTube, and this was not happening prior to the recent update 113.0 being installed last night on my computer. I've tried the previous fixes like clearing the cache, etc., and it seems to be a bug in the recent update since this did not happen prior to last night's update installation. I played the same videos in the Chrome browser and the issues are NOT present, and the videos expand to cover the entire screen as normal. Does anyone have a fix or can a fix be requested? Thank you.