Piracy: ꜱᴀɪʟ ᴛʜᴇ ʜɪɢʜ ꜱᴇᴀꜱ

Eh, DDG is just as shady as most others. Starting with their contract with MS.

Basing their browser off of chromium (or Edge and "underlying OS technology" or however they phrased it) just helps to further the Google monopoly.

"DuckDuckGo uses clear gifs from the domain improving.duckduckgo.com. This is a tracking technique and can be used to collect analytics about your web browser. Whenever you use DuckDuckGo, several requests will be sent to this domain.[4] This is of course not the kind of behavior that you would expect from a privacy concerned website, but there it is. Do you trust DuckDuckGo to collect "anonymous" analytics about you?"
-- From: https://spyware.neocities.org/articles/duckduckgo

Not that I view that quote as fact of any sort, but something to look into before jumping on the bandwagon so to speak.

Then of course there's also DDG's CEO, Gabriel Weinberg.

"Gabriel Weinberg, the founder of DuckDuckGo, used to run the Names Database.[1] This was a website that aimed to connect people who had lost contact by gathering lots and lots of e-mail addresses. Getting access could be done by either paying money, or submitting lots of e-mail addresses of other people. Since the service revolved around gathering personal information, it is very suspicious for Gabriel Weinberg to start a business that is privacy-oriented."
From: https://archive.is/20150624075735/https://8ch.net/tech/ddg.html and https://archive.is/N2qe8

So the real advice as to what browser to use? Use whatever one you want that has the features you like and enjoy. Anything else is a gamble in terms of support, security, compatibility, and usability.