I'm sitting in a work environment trying to connect to my phone provider via chat on their website. When I press the Chat button, Firefox does a few things and then tries to perform a TLS handshake with Facebook.com . As in many workplaces, Facebook, Whatsapp and so on are blocked, so the handshake fails and I can't use the function despite my not wishing to visit Facebook at all. Surely others must experience this problem? Firefox is getting really unwieldy these days ....