I think the Android tag got added when I switched to WebExtensions, the truth being that this is completely untested. So until I decide to take a good look at it, there is presumably nothing you can do on your end.
You can keep track of the issue here: https://github.com/spenibus/cors-everywhere-firefox-addon/issues/15
This is obviously not getting resolved very fast, although there is no need to remind me every six months.