GreenBrowser is your best choice of flexible and powerful green web browser. GreenBrowser is free to download and use.
This is an outstanding web browser. It's a lot like Maxthon and Slim Browser in many ways. For example, it offers tabbed browsing, plenty of security features (ad blocking, site blocking, and so on) as well as a ton of configuration options.
Link to Free Download: GreenBrowser Web Browser (http://www.theinfostride.com/forum/index.php?action=downloads;sa=view;down=81)