Can we at least know if this is planned, discarded or something? it has been a lot of time since first proposal so at least having an: it won't happen sorry would be great.
Hey, @ilab and all! Sorry for the delayed response - the short answer is that we're still working on some things on our back-end and evaluating how Chromecast support could work in Firefox. No firm commitment on a green light at the moment, but I'll follow up in this thread for updates as developments come forward.
This is my long-winded way of saying that we're putting this "Under Active Review" these days. Thank you for your patience!