For Chrome, the same questions apply.
I own an Amazon Fire phone (got it REALLLLL cheap, as a toy).
I also own a Nexus 2013 (that 7 inch tablet, got it for free)
I considered using Mayday to ask, but decided it'd be awkward. So as I cannot find a straight answer, I'll ask here.
If I buy the firestick/chromecast, my understanding is that I can:
1. Download videos onto my Fire phone/Nexus
2. After plugging the firestick/Chromecast into my TV, I can:
a) Mirror my screen onto the TV (?)
b) As result of A, use my TV as a screen for browsing/games/ANYTHING
b) Play ANY video of my choice on it via ANY app (Amazon store not withstanding)
At work some guys been telling me Chromecast only works with certain approved apps/Google stuff. And for Firestick I cannot find straight answers.