I've used it, ended up reverting back to Chromium / Iron as my WebKit-based browsers, for what reasons I can't remember exactly but probably as I didn't feel as though Dragon offered any worthwhile features for my uses. It doesn't have an installation ID which both Iron and Chromium already do not have. secureDNS may not be a good idea to use with AirVPN, you can choose not to use it whilst installing. Staff would be better at commenting on that.
Here's a review I read back whilst I was giving Dragon the test that I think you'll find useful.
Chromium (and Iron last time I checked) does not have an auto-update feature so it's less convenient than Chrome or Dragon. For the most part I use Firefox (Aurora) with addons NoScript, Adblock Plus, DoNotTrackMe and HTTPS Everywhere. There is also HTTPS Finder which works along side HTTPS Everywhere. If you're on Windows you can use the HostsMan freeware to manage your hosts file and populate it with IPs to help block tracking and ads in and outside of your browsers. These setups are not the most convenient for browsing but they certainly help keep you in control. Chromium/Chrome offers the same extensions minus NoScript (though there are substitutes).