Xfinity stream on Firefox macOS Monterey 12.7.5

Hello,

I stream TV online using Firefox, macOS Monterey 12.7.5. I cannot stream live TV. I get the error message:

There was a problem connecting to the video stream. Please try again later.

This is new today, and I noticed the splash scream for Xfinity Stream has been updated.
Streaming does work with Google Chrome.

Is it me, Firefox, Xfinity, or a combo?

Thank you.