Opera Beta is a web browser developed by the Norwegian software company Opera Software. It is a preview version of Opera, designed to test upcoming features and bug fixes before they are rolled out to the public version of the browser. Opera Beta is aimed at developers and early adopters who want to test the newest features and provide feedback for development. Opera Beta supports a number of advanced web technologies such as HTML5, CSS3, SVG, and WebGL. It also includes a range of features to help improve speed, performance, and security. Opera Beta also offers a variety of special features, such as a built-in ad blocker, VPN, and support for multiple tabs and extensions.
Warning UC Browser leaks private and personally identifiable information to a server in China: https://citizenlab.ca/2016/08/a-tough-nut-to-crack-look-privacy-and-security-issues-with-uc -browser/