Since v109 Chromium has incorporated MathML but I've found some basic functionality missing. There are easy workarounds for most of them but its a pain discovering what works and what doesn't by trial and error.
mfenced - (eg used for braces/parenthesis) doesn't render.
lquote and rquote - sometimes don't render depending on complexity of line.
mathsize small/ normal, big are all the same (might be deprecated, there's confusion)
linebreak - doesn't render
menclose notation - doesn't render
mfrac bevelled is always false (no sloping line for divide)
mtable frame - doesn't render
msqrt - doesn't stretch vertically to enclose all its argument and hence usually doesn't centralise vertically either.
Also although quite a lot of MathML3 works well there are a lot of things that don't render properly eg mstack, mlongdiv, apply etc.
mglyph src doesn't render source image.
There's more
Re: MathML Rendering in Chromium-browser
The nice feature of MathML is, that it is rendered on client browser.
But because of the problems you mentioned and I saw in the past, relying on MathML is difficult.
You don't know what people will see with different browsers, browser versions and/or OSes.
MathJax has to be processed on backend.
But Github supports MathJax, and all browsers on all OSes will show "the right thing".
I played with it here:
https://github.com/Hermann-SW/Mathematical-expressions
But because of the problems you mentioned and I saw in the past, relying on MathML is difficult.
You don't know what people will see with different browsers, browser versions and/or OSes.
MathJax has to be processed on backend.
But Github supports MathJax, and all browsers on all OSes will show "the right thing".
I played with it here:
https://github.com/Hermann-SW/Mathematical-expressions
https://github.com/Hermann-SW/RSA_numbers_factored
https://stamm-wilbrandt.de/GS_cam_1152x192@304fps
https://hermann-sw.github.io/planar_graph_playground
https://github.com/Hermann-SW/Raspberry_v1_camera_global_external_shutter
https://stamm-wilbrandt.de/
https://stamm-wilbrandt.de/GS_cam_1152x192@304fps
https://hermann-sw.github.io/planar_graph_playground
https://github.com/Hermann-SW/Raspberry_v1_camera_global_external_shutter
https://stamm-wilbrandt.de/