Add-ons don't show up anywhere

Add-ons Add-on Support
#1

I have tried downloading a couple of different add-ons, and always get “Downloading Add-on” message, but then when i go to my add-ons list (or my downloads list), the add-ons are not there. I am on a Samsung Galaxy S2, using Firefox Aurora 48.0a2

#2

I suggest looking for help on our support site first.