Does Flash Player work on Android 5 with Firefox 48

I have an Amazon Fire (KFFOWI) with CM12.1 installed and have Firefox as my browser. I have installed the archive flash player [11.1.115.81](http://download.macromedia.com/pub/flashplayer/installers/archive/android/11.1.115.81/install_flash_player_ics.apk) but, when I try to use it, all I get is _"A plugin is required to display this content"_. I've read many things that suggest that it should work but they are probably stale and out of date. So, as of October 2016, does the Flash player work on Android 5.1 and, if so, how does one get it working?