AdNauseum situation was funny, you had Firefox endorsing it as a high quality ad blocker in a Mozilla press release, then Google bans it because they consider it malware.

Folks have raised concerns about Mozilla's funding from Google Search, but it's pretty clear from their past actions that they see supporting ad blocking as non-negotiable. Their diverging implementation of Manifest v3, while still incomplete (it's rapidly improving in 120, most of the remaining issues are related to Fenix support and Chrome parity), is thoughtfully designed to continue to provide familiar APIs for ad blocking.