Why doesn't Amazon Prime Video work even after latest Firefox update?

Prime Video is unusable on Firefox since the latest two updates. The website freezes. Videos don't run. When I change the settings as has been suggested either the problem remains the same, with lack of loading, or videos are unavailable. I have read and done whatever has been mentioned in the past, so my only conclusion is that Firefox does not support Amazon Prime Video, as well as the Amazon website. The option I have now if I want to watch Prime Video is to run it on Safari. I look forward to Firefox fixing this issue. I just want it to work as it had done in prior updates. I don't need to continue to alter settings when it is obvious, to me at least, the problem doesn't lie with the settings, because none of them work. Thank you for your time and consideration.