On this site we can read
Recommended extensions are curated extensions that meet the highest standards of security, functionality, and user experience.
and
All Recommended extensions should not only function as they promise (…)
and
Firefox is committed to helping protect you against third party software that may inadvertently compromise your data—or worse—breach your privacy with malicious intent.
So how comes that Mozilla is recommending Ghostery addon which is know of reselling our private information to advertisers*? Is that means I shouldn’t trust any of addons recommended by you? Or maybe that this
Can developers pay to be recommended?
No. All Recommended content is curated solely for the purpose of providing Firefox users with great browsing tools and experiences.
is simply a lie?
*That’s exactly how Ghostery owners make money.