If you want safari support, wikipedia.rehash [1] has the option to install as a per-user custom css on wikipedia, so the style can be automatically applied when you log into wikipedia. Hence it works on tablets as well. Its redesign is not as extensive as this project, but the goals are quite similar.
I hooked up something similar when I was writing "julia as a cli calculator" [1], but it uses real TeX behind the scene, which gives me the opportunity to utilize existing TeX ecosystem such as TikZ and typography. Accessibility can be a problem, but I think it's possible to include some hints via the title attributes with some work.
I hope to see more server-side solutions. The customizability and client-side overhead (you only need to render once on the server, possibly with caching) is not something a client-side library can achieve.
It's just a small mistake in the CSS file :) Since Julia requires a ton of Unicode characters, I'm using a different monospace type from usual, so I forgot to put the fall back `monospace` at the end of `font-family`, but it's fixed now.
[1]: https://github.com/Krasjet/wikipedia.rehash#user-content-opt...