Firefox also uses Google's Widevine CDM. I'm curious if the HDMI monitor flashes are an issue with Chrome's integration with Widevine or in Widevine itself (and thus also affecting Firefox).
Monitor Flashes because internally is basically changing inputs as it changes from unencrypted video to encrypted HDCP video
How does one use Firefox without widevine to watch a DRM video stream?
I meant you can still disable DRM completely or enable only on request.