What is Perpetual Beta? And how is it different from a Traditional beta?Perpetual beta is the keeping of software or a system at the beta development stage for an extended or indefinite period of time. It is often used by developers when they continue to release new features that might not be fully tested. As a result, this could be a much more rapid and agile approach to development, staging, and deployment. In the traditional model, you downloaded a binary, and ran the same binary multiple times. On the web, every time we view a page, we are downloading the content again. This opened the door for the perpetual beta model. In the Perpetual Beta model, features are fully tested before being implemented into the web service. If you see a bug, it’s not supposed to be there, and you should report it. A perpetual beta web service is effectively in beta and released at the same time. That’s why it’s perpetual beta. One of the main characteristics of perpetual beta is to engage your users as real-time testers, and instrument the service so that you know how people use the new features.
The final version of Internet Explorer 9 was publicly released on March 14, 2011 during the South by Southwest (SXSW) music and film festival in Austin, Texas.
Therefore with IE9‘s improved feature set and interface it’s ultimately going to come down to personal preferences as there are other application thats offers better performance in terms of the speed in opening a browser. E.g Goggle Chrome and Mozilla Firefox.