I'm pretty sure that Mozilla isn't getting into the search/ad business. I assume that's what you mean when you say "search capabilities".

While it would be good news if they were, insofar as creating more competition for the incumbents (let's be honest, the incumbent, google), at this point only regulators can do anything about the state of search/ad industry.

If this is actually the case Mozilla is yet again being used as one of Google's pawns.

"See, there are other browsers and search/ad companies flourishing despite our market position!"