I recall Codeforces having MathML / MathJax support a few months ago. With this support, mathematical notation in problem descriptions and analysis / editorials was rendered beautifully in clear fonts on the screen, such that it was a pleasure to read.

Recently, however, mathematical notation in Codeforces on both Chrome and Firefox is rendered as bitmap images of much inferior quality.

Was MathJax turned off for some reason? Is there a way to turn it back on?