Tor

The grandparent of browser security, Tor is where you go when you don’t want anyone breathing down your neck as you surf the web. Tor, which stands for “The Onion Router,” lets you hide your browsing as if it were protected under layers of an onion.
Anyway, why Tor is popular among privacy advocates is because it routes your internet traffic through intermediary servers and encrypts it at every step along the way, making it difficult for advertisers to track you. Eventually, your now-invisible traffic reaches an exit node and hits the open web. Using Tor is a much stealthier way to browse than relying on an incognito mode, because your IP address is hidden, and therefore can’t be traced.
But it isn’t for everyone, or even most people, for that matter. The complex process of concealing your browsing traffic results in poor performance—that is, webpages will load much slower than they do in Chrome or any of these other browsers. Tor’s interface is also clunky and not customizable.
Tor can be downloaded for free on Windows, iOS, Linux, and Android.