I like and use DuckDuckGo, this extension is great, but i would like to see more features. It does not do so much if using a adblocker and HTTPS Everywhere. I wish it had some of the following:

Canvas Fingerprint Spoofing (Video)
Audio Fingerprinting Protection
WebGL Fingerprinting Protection (Updated)
JS Crypto Currency Mining Domain Blocking
WebRTC IP Leakage Protection
WebRTC Device Enumeration Protection
Client Rects Protection
Screen Resolution Spoofing
User-Agent Spoofing
Battery API Spoofing
Browser Plugin Fingerprinting Protection
Hardware Fingerprinting Protection
Beacon/'Ping' Request Blocking
Blocks Malicious Top Level Domains
Hyperlink Auditing Prevention
HTTP Referrer Header Controls (Video)
Chrome Header Tracking Controls
E-Tag Tracking Mitigation
Removal of URL Tracking Parameters
Removal of specific Tracking Cookies

Breaks some HTTP-only website, e.g.
http://y20k.org/escapepod/

Not only didn't work, but broke my existing DuckDuck Go. Removed the Privacy ext, and now must remove and re-add the Search engine and hope it works again.

Switched the default search engine to its own (DuckDuckGo), without showing any confirmation windows whatsoever.
Changed it back to Google, but after the restart - it was changed back to DuckDuckGo.

Great, I use it to set duckduckgo as my default search enginee. It only lacks the feature to set duckduckgo lite as the search engine. It's considerable faster in my region and it firefox dont sync search engines so i have to configure it all the time. (if you guys do so please also add per user config cloud saving plz).

thank you duckduckgo team for your service. FFFFFFFF

I guess this might help, but it made some websites javascripts not work resulting in the website layouts completely messing up. Had to disable this addon for the time being.