I see fuelly just fine also. I'm running W7 and FF v46.0.1 with AdBlockPlus and Ghostery active.
However, with Android and FF v46.0.1 with AdblockPlus and Ghostery active, I get "hidden content". With AdBlockPlus and Ghostery disabled, I still get "hidden content".
Looks like one for techies.
Ah! I see the difference for me. If I'm not logged on to CruzeTalk, I see "hidden content". If I'm logged on, I see Fuelly.