This is definitely worth the read for everyone using FB.
"If a government requires you to download a document, they should make sure there’s a freely available solution and a freely available platform that can run that solution. For example, if they make you download a .pdf, they shouldn’t endorse Adobe. They should make sure there are .pdf readers and writers that support what they need you to do with that document — and they should fund development of that software, the same way they would put in a wheelchair ramp. The same way we have accessibility when it comes to the physical world, they should provide some public services while you’re involved. People need to be humans."