mml3: XSTL support after December 26

[physikerwelt]

https://github.com/mathjax/MathJax-src/blob/60ed165d2305b078e3d0fdaefa95366fde844cff/ts/input/mathml/mml3/mml3.ts#L74

emits a warning that XSLT will be removed in Chrome

https://developer.chrome.com/docs/web-platform/deprecating-xslt

[dpvc]

Yes, Firefox is saying something similar.

It looks like there might be some javascript XSLT libraries that can be used in place of the native ones. I doubt that we will be able to convert to a native implementation of the elementary math tags by then.