I updated to Firefox 109 on my CentOS 9 Stream system. I noted that streaming video did not work. I tested with Disney+ and the CW TV network. I changed a few settings, and I have a subscription to Disney+ but CWTV is free for all to connect to (well, at least in the US, I can't guarantee overseas access). So, what is the problem? Well, it is two-fold. On Disney+, I get video and closed captioning but just a low steady beeping tone instead of audio. On CWTV, I get nothing but a green screen and that same tone. It is not an issue with the codecs or the OS, because Google Chrome 109.0.5414.74 displays them perfectly fine. I should note that before I started tweaking settings, I kept getting the FFMPEG errors that plague most people. See the settings below in the shared data.