To show off what EdgeHTML can do, Microsoft has built a browser using predominantly JavaScript, HTML, and CSS. Next, the company released the app on the Windows Store and the sample code on GitHub.

Custom in-app browsers are out of their reach, though. Such browsers are annoying by default, as they won’t have the history, usernames, passwords, or sharing options from your default browsers.

Among the JavaScript engines that use JITs are Chrome's V8, Opera's Carakan, and Safari's Nitro, IE's Chakra, and Mozilla's SpiderMonkey engine -- whose latest JIT is called IonMonkey.

Also: How to use Tor browser (and why you should) " In-App Browsers subvert user choice, stifle innovation, trap users into apps, break websites and enable applications to severely undermine user ...

For instance, an app can use a custom in-app browser to collect all the taps on a webpage, keyboard inputs, website title, and more. Such data can be used to create a digital fingerprint of a person.

More notably, it took a mere 74.1ms to complete Sunspider, making it easily the fastest browser for running Javascript. Sadly, it’s every bit the memory hog that Chrome and Opera are, using ...