It's no secret that Microsoft was prepare a new browser to “replace” the internet explorer.
So far this browser has been known by the code name: Project Spartan. Now it's official, the browser is available for Windows 10 and will be called Microsoft Edge. Microsoft Edge will be the default Windows 10 browser.
The browser has a different design, has almost no borders, so it was nicknamed Edge and it will be compatible with a wide range of gadgets with Windows 10. Edge will have support for extensions and with some modifications we can have Chrome extensions in the new browser from Microsoft. As already announced, Edge has integration with personal assistant Cortana;
See the official Microsoft Edge presentation: