A:AnswerI don't use Firestick, but it has a USB port so I think all you would have to do is change the source. Look the tv up on Best Buy's web site. I believe it will tell if you can use the fire stick. Good luck.
A:AnswerThe dimensions are on the BestBuy web site. Mine fit in a small cabinet in my little motorhome for traveling. I looked up the dimensions there, but no longer have them.
A:AnswerRoku devices are compatible with this tv, although it is not a 4k tv, therefore you don’t have to buy such a high performance roku, but you still could if desired.