As of about a week ago, my Brave browser does not detect my Chromecast connected to my TV. It will search for it, but return “No devices found”. Both the computer and Chromecast are on the same wireless network, as Chrome is able to find and stream. I have verified that Media Router is turned on, have closed and re-opened Brave, and rebooted computer, to no effect.
Brave version is 1.17.75
*Update: The issue was with uBlock Origin. Chromecast worked fine after turning it off and on again.