Unfortunately, doesn't seem to work... Uncaught (in promise) DOMException: MediaRecorder constructor: video/webm;codecs=h264 indicates an unsupported codec

Unfortunately, doesn't seem to work... Uncaught (in promise) DOMException: MediaRecorder constructor: video/webm;codecs=h264 indicates an unsupported codec screencap.video:123 Uncaught TypeError: mediaRecorder is undefined Mozilla/5.0 (X11; Linux x86_64; rv:103.0) Gecko/20100101 Firefox/103.0