> When you access DuckDuckGo (or any Web site), your Web browser automatically sends information about your computer, e.g. your User agent and IP address.
> Because this information could be used to link you to your searches, we do not log (store) it at all. This is a very unusual practice, but we feel it is an important step to protect your privacy.
OTOH they could introduce some simple statistics, i.e. do not store UA, but increment the value of browser name+version key. It wouldn't lower privacy level of DuckDuckGo users.
But... it works only for Iceweasel, as it's debian-specific (well, debian-blends-and-derivates-specific too), so it's not a good enough solution.
BTW If we have 'Windows NT 6.1' and such in UAs, couldn't we just put there the distribution name+version next to 'Linux'? We already have such information available as LSB requires it AFAIK. It's a bigger change (and wouldn't be done for debian only), but maybe worth considering?
Then they could store sufficiently detailed statistics for OSes too.