Chrome's compatibility is 100%, because it's defined in terms of compatibility with Chrome. (Despite the fact took 21 years before Chromium got a
limited subset of MathML, when Firefox had it from Mozilla 1.)
> I am very much against the monopoly Google has over the web space and their positioning to dictate future web standards
Then, to the extent you can, stop using Google-controlled browser engines. Google can only dictate future web "standards" if they're the de-facto standard browser engine… so just refuse to acknowledge them.
If you make websites, use stuff that only works in Firefox (and the indie browsers), like Content MathML, or stick to stuff that works in every browser – and by that, I mean clean, semantic HTML. Force Google to play catch-up for once, or make the whole "catch-up" game irrelevant.
My favourite such feature is alternate stylesheets. Supported by Firefox, and by basically every CSS-supporting indie browser, but by almost none of the Chromiums.
