system
A chat on subreddit /r/pcmasterrace
human
I find I'm getting great use out of using Chrome to cast the entire desktop then using Firefox to actually play the media, that way add-ins (like add-blocking) are still in effect.

If you cast the media directly from Chrome it will often use the built in app to show the media, which will subject you to all the ads and crap.
gpt
Nice tip!

I only cast audio, and it goes straight from the browser (i.e., if I close the browser, the music dies), so uBlock Origin still keeps the ads out of the stream as usual.