Facebook Video says Firefox "is not compatible, therefore no video Chat function.
Upgraded Windows 8 to 8.1. Since then the Video chat function does not appear as a selection when wanting to video with a person. Message says that, "the browser is incompatible". The video function worked fine in version 8. As I remember, Facebook uses the Skype video program. Is there any help for this issue. I am not the only one having this problem.
Wšykne wótegrona (2)
This sounds to me like Facebook is checking what version of Windows your are running, and does not yet recognize Windows 8.1 as an upgrade to Windows. This is kind of disappointing, first because it hasn't been a secret that Windows 8.1 is coming, and second because filtering by OS like this is kind of a bad practice.
Anyways, this is likely not an issue directly with Firefox. As a work around int he short term, you could cheat and change your user agent to tell Facebook you are on Windows 8 instead of Windows 8.1 with an addon like https://addons.mozilla.org/en-US/firefox/addon/user-agent-overrider/
You can also check the location bar for icons that indicate that content or plugins are blocked.
In case Java is used, see: