While the non-final build of Opera's new browser for PC and Mac was simply called "Next," today it's chosen the more formal title of Opera 15 for its official release. There aren't any features of note that we hadn't seen in the desktop preview of the WebKit-based software (or should we call it Blink-based?), but to jog your memory, it sports a fresh design, a Discover feature for catching up on the latest news, and a tweaked Speed Dial menu for quick access to your favorite corners of the internet. Also, the web-clipping Stash feature, predictive address-come-search bar, new download manager and "Off-Road mode" for extra compression on lousy connections are all included in the final version. We ran a quick SunSpider benchmark on the Mac build of Opera 15, in which it scored 167ms, compared with 171ms in Chrome. If you're not already allied to one of the many competing browsers and feel like giving Opera 15 a try, head to the source below for the download links.