@nblr They already know that ad blocker usage "has a positive impact on user engagement with the Web" -- but afaik haven't done a similar study for the built-in Firefox ads. https://research.mozilla.org/files/2018/04/The-Effect-of-Ad-Blocking-on-User-Engagement-with-the-Web.pdf
(The company to watch in this situation will be IBM (Red Hat). They need a browser for RHEL, but won't want to impose the costs and risks of in-browser ads and slop on corporate customers—IBM has its own "AI" to sell)
@vonxylofon @nblr It pre-dates any particular hire, though. Every so often, Mozilla goes on an ads-in-the-browser kick, then pulls back, and tries again.
This time they're doing "programmatic" ads in "partnership" with a conventional adtech firm, which is pushing the boundary a little more https://www.adweek.com/media/mozilla-index-exchange-first-programmatic-partner/