I have the latest Firefox version 93.0 and the right click menu options haven't changed in a very long time and the Save Link as... option has been there for as long as I can remember.
I have never used Edge, I have avoided it from day one, so I can't comment on that.
But as r@vast mentioned he can connect to wsfa.com also without issue, so no avast alert either.
Something very strange going on.