Adobe flash player won't download.

Im using firefox, every single time i try and download it, it fails instantly, doesn't even try to download anything. Like literally, as soon as it appears in the download box it's failed, no error message or anything other than it just saying "failed". I have completely wiped everything to do with firefox from my computer and freshly installed it and im getting the same issue.

I can't use another browser, because firefox is the only browser that seems to feel the need to tell me it needs updating, yet it wont let me download iut.

Any advice anyone could offer would be great, thanks.