Why is that? And why is ur adblock so garbage? Ublock origin blocks everything, and i never see ads. I shall use that instead of this poor browser im sorry but its just so bad.
YouTube ads are getting a fix in the next release (0.14.0) Have you tried using regional ad block filters in settings? If the ads still show come back and say what sites you are seeing them on and what operating system so @luke.mulks can take a look
Confirming that 0.14.0 will have the updated fix for YT.
If there are specific cases where ads are bypassing blocking, please report the URL, and what platform the issue was observed and provide a screenshot so we can investigate and resolve.