It wasn't at ALL clear to me that this entire process takes place in two DIFFERENT Firefoxes: one on a desktop or laptop install and THEN on your android device!! Maybe I read thru the instructions too fast (real men don't read instructions 😉 ) but they all seem to say "...open Firefox..." without being clear WHICH Firefox they're referring to.
I've now spent close to 3 hours trying to get 3 extensions to work/load properly into Fennec on the Android... Back to Kiwi! "It just works..." 😡