Hello,
Yes, it works on Android. However I've notices as well that Firefox on Android behaves strange and some API doesn't return correct data - for example discarded tabs (that weren't visited in some time) won't return tabs names nor URL. Sadly there is nothing I can do (or at least I'm not aware of). You see, the code for Android is the same as for desktop version, there is only very little small tweaks, usually related to visuals.

Anyway, thanks for pointing this out, I will try to investigate it further, maybe there is some solution and if not, I will report it to Firefox team.

Best regards,
Juraj Mäsiar