To me, this only makes sense if it's integrated advertising in the browser. Trying to get third party websites to use their advertising network probably will be a very difficult sale.

It could be a way of greenwashing, or whatever the expression is for privacy washing, businesses like meta, Google, by letting them license a "privacy friendly" advertisement platform.

As far as I'm aware, there's only two major online advertising platforms, meta and Google. So breaking in is a third platform would be difficult, unless they could integrate into apps directly through Mozilla's app footprint

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Fundamentally, privacy and data-driven marketing are diametrically opposed