Pale Moon 28.14.2
Page: https://www.smpte.org/
Firefox renders this page, though it's obviously formatted for smart phones, not computer browsers.
Pale Moon makes soup. The font is so large only a couple of lines are visible with 1 or 2 chars. Applying minimal font size is still too large, but some text is then too small to read.
I've tried using both the web page's font size and my font size in 'Preferences'. I once saw a similar problem a long time ago, in a version far, far away.

My laptop display is 3840x2160.
PS: I see this has been added: "If your question is about general use of the browser and not specific to Linux, then please use the General Support board."
How would I know?