Crusta is a feature rich web-browser, based on Qt5 and is licenced under GNU GPLv3. Crusta is available for all major desktop platforms (Linux, Mac and Windows) and will soon be available for mobile platforms.
Crusta's version 2 is under development. I regularly work on it & commit the code to make v2.0.0 available as soon as possible - but I am currently in my third year of college - so I can only devote a small amount of time daily. You can find more about me here.