Amazon want you to watch their own services which is why they make it very difficult now to load any other content besides Amazon's own, this is why I'd never advise getting an amazon device unless you're only ever going to want to view Amazon stuff on it, additionally fire sticks are getting a bit long in the tooth and have very limited technical specs in relation to other things around. (see my previous post of streaming hardware)
My own personal box I use is this:-
http://www.amazon.co.uk/gp/product/B00YCIK90W
Airmouse:-
http://www.amazon.co.uk/gp/product/B009FQYLLE
at £99 + another £12 or so for the airmouse it's hard to beat. Obviously for some people that is a bit too expensive, but some of the things you see out there for £30 -£50 can be really dodgy, cloned chinese knock offs etc.