Firefox 33 was an official release. Things being broken should be a surprise in an HTML5 compliant browser. If sites use bleeding edge features with no program

Firefox 33 was an official release. Things being broken should be a surprise in an HTML5 compliant browser. If sites use bleeding edge features with no programmed fallback or error handling apart from "miserable failure", they have a responsibility to at least inform users of their limited browser support rather than pretending to be a website on the internet - which by its nature should be accessible to an official release browser from 2014 without failing miserably.