Update 2: Try the latest version please.

It shouldn't require an activator for Firefox. Apparently that piece of code didn't work for Firefox Mobile. Thanks for pointing it out, I had no idea.

Update 1: I checked and it shouldn't have done that. Maybe it's the browser, my Firefox mobile doesn't ask for activator. Either way, ignoring activator on mobile devices should fix this entirely. Kiwi browser had a problem too, that's fixed as well. I will release the update soon.