How to FIX MacOS black screen when watching a stream with 2 monitors connected
UPDATE: I've tested it with v91 and it works even better.
This is a video on how to fix (or rather work around) MacOS problem when connecting two monitors and trying to watch Netflix, Hulu, Disney+, Udemy, etc.
Download link to firefox version 78: https://ftp.mozilla.org/pub/firefox/r...
Other versions: https://ftp.mozilla.org/pub/firefox/r...