MathJax LaTeX plugin is not compatible with Tor Messenger 0.2.0b2

When I first searched it on the Add-ons menu I could not find it. I had to directly download it from the instantbird plugins website at this address:

https://addons.instantbird.org/en-US/instantbird/addon/340

I then used the "Install Add-on from file" in the Add-ons menu but then I got the following error:

MathJax LaTeX could not be installed because it is not compatible with Tor Messenger 0.2.0b2.

It would be really great if this issue could be resolved, since it's practically impossible to chat about maths without MathJax.

Trac:
Username: madystar