With the recent (almost unfathomable) decision by congress (here in the U.S.) to allow ISP's to spy on users and sell their information, many folks have turned to the TOR network to maintain their anonymity. (TOR randomly bounces your communications between a network of servers, so you can't be traced.) The TOR folks offer a browser that uses the TOR network by default with no add-ons necessary:
TOR Browser (free)
https://www.torproject.org/projects/torbrowser.html.en
Just the TOR browser alone does not really provide anonymity, due to the DNS queries that the browser makes to the ISP's DNS server. Adding
DNSCrypt to the device in question is an improvement, but the ISP will know the first hop, or TOR gateway's IP address. Based on today's environment, that in itself could raise the suspicion of "What are you hiding?" Unfortunately, this is the world we live in the US.
I've been using TOR, both in Windows and Macs for years and based on my experience, more and more ISPs slow down and/or outright block access to TOR gateways. Not to mention that more and more websites require completing Captcha for TOR gateways's IP address, or last last hop before accessing the website.
TOR combined with DNSCrypt is still better from the privacy perspective, than any of the VPN services, free or paid for. Just don't believe that it is fully protecting you...