Vivaldi is a new modern web browser from Vivaldi Technologies, a company founded by former co-founder and CEO of Opera, Jon Stephenson von Tetzchner. It is available for windows, mac and linux OS. You can download it from vivaldi download page.
It will work mostly well with windows but it will cause some flickering or flashing screen problem in ubuntu and some other linux distributions. For example if you play any youtube video on vivaldi browser it will happen. Mainly the flickering depends on you GPU driver.