MathJax manager Peter Krautzberger continues his quest to get web browsers to support MathML, by tweeting a link to this page on the Windows UserVoice forum where you can vote to get the Microsoft Edge team to implement the maths markup standard.
Vote for MathML support: MathML at Windows Dev Feedback.
Previously in MathML’s struggle for anyone to care:
MathML 3.0 is now an ISO standard
Dark days for MathML support in browsers