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Why don't they team up with FF instead?

Mozilla is unlikely to “team up” strongly with any particular search provider, as its main source of revenue (for funding development) is auctioning off the default search provider for Firefox every few years.

It just did this a year ago, with Google paying $400-450m per year for the rights.

Teaming up with DuckDuckGo would place this revenue source at risk.
 
i hate to break it to you but DDG is just forwarding Bing.com results for the most part. They are not going to be as good as the Trillion dollar company Google.
DuckDuckGo uses multiple backend APIs (Bing, Yahoo, Yandex), as well as its own crawler to some extent.

But it doesn’t directly forward user traffic to these sites, it acts as a privacy-enhancing intermediary. The backend source doesn’t see the IP of whoever is searching, while DuckDuckGo itself doesn’t create per-user profiles, it just collects aggregate metrics.

Results are pretty good for me, and when they’re not, I just add “g!” (or even better, “s!”) to the search.
 
DuckDuckGo uses multiple backend APIs (Bing, Yahoo, Yandex), as well as its own crawler to some extent.

But it doesn’t directly forward user traffic to these sites, it acts as a privacy-enhancing intermediary. The backend source doesn’t see the IP of whoever is searching, while DuckDuckGo itself doesn’t create per-user profiles, it just collects aggregate metrics.

Results are pretty good for me, and when they’re not, I just add “g!” (or even better, “s!”) to the search.

I don't know if they use Yandex but Yahoo is just another proxy for Bing. For privacy definitely DDG but for best results Google is king. Startpage is a nice middle ground too but I dont trust them.
 
Mozilla is unlikely to “team up” strongly with any particular search provider, as its main source of revenue (for funding development) is auctioning off the default search provider for Firefox every few years.

It just did this a year ago, with Google paying $400-450m per year for the rights.

Teaming up with DuckDuckGo would place this revenue source at risk.
I get the revenue part but just seems like it's reinventing the wheel to create a brand new browser with a fully new platform instead of strengthening what's there....even if they fork their own.
 
Mmmm I appreciate their focus on privacy, but unfortunately their search results are quite often questionable (and for that reason have become the preferred SE for conspiracy theorists/QANON types).
 
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