There's an interesting disease showing up here in the responses. I accept DDG's statement that this is about a favicon and that they "do not collect or share any personal information", and despite that, I also agree with others that DDG should be on the safe side and just stop doing this small thing. It's just the safer and more moral thing to do (So DDG, as many are suggesting, plz stop doing it. Today is good). But…
And for the record, collecting your browser history just to display a stupid favicon is the most ridiculous excuse I've heard in a long while. And I am not going to blindly believe them because they said that's what they use it for.