True privacy is a lie. I can't imagine how "private" you web browsing will be when you are one of 5 people on earth running the DuckDuckGo browser. Kind of narrows down the playing field doesn't it?
All a browser truly needs to be private is to be open-source and have good extensions (AKA Firefox). All of these browsers where "privacy" is the main selling point are really not doing anything new.
You mean for the sticks or triggers? Steam Input has features to emulate that on most controllers I believe.