Based on Chromium 66.0.3359.45, the upcoming Opera 53 web browser recently entered beta testing with a bunch of enhancements and optimizations, but also multiple bug and security fixes. Among these, the most important change appears to be the revamp of the appearances of tabs for Mac systems. While this optimization to the way multiple tabs are handled is mostly targeted at Mac users, we believe it could also benefit Linux and Windows users. On top of this, Opera 53 beta revamps the address bar a little with a fresh coat of paint so you can be more productive when accessing your most used websites.