[Tutorial Feedback]

Hello. The section of the tutorial on using MathML to represent math
expressions seems to be out-of-date:
https://www.w3.org/WAI/tutorials/images/textual/#using-mathml

It tells me that a plugin may be necessary to make the examples display
correctly in Firefox, and provides this link for where to download the
plugin: https://addons.mozilla.org/en-US/firefox/addon/mathml-mml3ff/

However, that link is broken.

 

I believe the text of the section is out-of-date as well, but I'm less sure
about that.  The broken link is an obvious problem though.

 

Thanks.