@leocg and @burni thanks a lot! I had searched several solutions on my transition from Mint to Fedora, and problaby I will work with Chrome when I had some streaming issues (I watch much more than Deutsche Welle Live, it is actually just a random exemple).
Maybe I try Vivaldi sometime, or get back to Firefox (I had some issues with this browser too).
Thanks folks, and I hope Opera team could resolve this problem for the linux users, because I like this browser a lot.