I'm confused...am I running DDG's browser, or simply the DDG search extension? I know DDG has a browser, but their exhaustive description of protections says that those are all implemented for other brpwsers...so if Firefox is protected by DDG, why should I consider a DDG browser?

I always install DDG in my browser, rather than just using it 'in browser'. A reviewer on YT showed how merely searching with DDG in browser leaves location traces, to anyone who's looking.
He then installed this addon, did the same search, and the location details were gone.
He was using some location software, don't remember which sorry, but he certainly made a clear point.

It is absolutely an ESSENTIAL add-on. You should not crawl the internet without it.

Extension parfaite (tout petit bémol : empêche RMC BFM en direct de fonctionner)

Es el navegador que necesitaba privado y muy tranquilo.

Excelente experiencia, Gracias!

Posee excelentes métodos para proteger la privacidad y seguridad en la navegación, la uso desde hace mas de un año con resultados satisfactorios, haciendo relidad mis requerimientos en esa materia.