I Didn't know where this question should go. Chrome has ended support for some plugins and now does not render LaTeX using MathJax well (for example the fonts don't look right and there is a vertical bar following the math expressions in Chrome). Firefox is ending support by end of 2016. Is this going to be a problem or is this transition already solved? I don't know the details of the plugin interface html5 etc. to know whether the transition is a problem or not? But judging from what is happening in Chrome, it seems like it could be a problem.
Thank you for those assurances and clarification. I was under some vague impression that java was being deprecated and people were supposed to move to html5 or something like that. I do want to invest more heavily (time) in WebWork and want it to continue working well into the future.