Sideloaded Firefox and Flash on FireTV but says "incorrect version"

I have just sideloaded Firefox and Flash but when I try to run them I get "incorrect version" error or something similar.
Firefox apk is "org.mozilla.firefox_46.0.1-2015416000.apk"
and Flash apk is "com.adobe.flashplayer-11.1.115.81.apk"

Can anyone help please?

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