"No shady privacy policies or back doors for advertisers" proclaims the Firefox homepage, but that's no longer true in Firefox 128.
Less than a month after acquiring the AdTech company Anonym, Mozilla has added special software co-authored by Meta and built for the advertising industry directly to the latest release
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IMO it’s the option in
Data collection
calledMarketing data
. It doesn’t say it’s PPA outright, but it sounds like the same sort of thing. ¯\_(ツ)_/¯It’s a desktop only feature, it hasn’t been built into mobile I believe
The Fennec fork on android may be worth looking into