MSE has been available on Android since Firefox 41 (bug 1084456). That MDN page was out of date. Thanks for pointing out the error! I just updated it. :)<p><a href="https:&#x2F;&#x2F;bugzilla.mozilla.org&#x2F;show_bug.cgi?id=1084456" rel="nofollow">https:&#x2F;&#x2F;bugzilla.mozilla.org&#x2F;show_bug.cgi?id=1084456</a>