Diễn đàn hỗ trợ Firefox

HP INTEL LAPtop: Windows 11 Fails two sequential video mp4 links using basic html Video code

Works in iphone firefox,safari,opera,PC Edge but NOT PC firefox.

1st link good 2nd fails ERROR MSG no video with supported format and mime type found. Also had same problem in Windows 10 last year. This on an HTML 4.01 we site.

this is still really annoying: https://support.mozilla.org/en-US/questions/1500761

why is the icon even there or why does it have to disappear and then also change the tab size ?

1) if its there to enable you to play a tab in the background, then i want the option to switch the feature on or off (because i do not want to play anything in the background, atleast not via a 24/7 target practice with a mouse)

2) if its there to give you notice that there is a 'multimedia' tab open in your browser, then i want the icon to stay there and not dissapear plus change tab size...

like what is this even ? are we back in the 50s ?

I've tried messing with hardware acceleration, resetting the zoom to 100, it seems when i get the zoom as low as possible it tries to fall back into place, i can't find any fix on this, i like this browser but i cant watch anything like this

youtube goes fulscreen but not in the richt way i can see the video fully but it does not cover my sreen fully an the under part of my screen it is not posting see image for a better picture