Meet the private browsersFirefox Focus, DuckDuckGo and Brave are all similar, but with some important differences.Firefox Focus, available only for mobile devices like iPhones and Android smartphones, is bare-bones. You punch in a web address and, when done browsing, hit the trash icon to erase the session. Quitting the app automatically purges the history. When you load a website, the browser relies on a database of trackers to determine which to block.Let Us Help You Protect Your Digital LifeDuckDuckGo, also available only for mobile devices, is more like a traditional browser. That means you can bookmark your favorite …