Smartphone Firefox should have its own problem solving section. I'm getting tired of being sent to page showing a Firefox desktop display to solve a problem I'm having with the browser on a phone. Sync doesn't apply to Firefox on a phone so although the internal Firefox PDF viewer works on my desktop, that doesn't mean it works on the phone.

SO... why not realize that you have two different browsers and divide your your support functions between the two. Show the phone screen images and phone functions when a Firefox phone user asks for help.