Microsoft's next web browser, and successor to Internet Explorer, is Project Spartan. The modern browser has been demoed in a video published by WinBeta. They were able to take the leaked app for a spin to see how some of the features worked, including Cortana integration.
The virtual assistant will be able to perform a wide range of tasks in Project Spartan. Cortana will also display related information to what you're looking at too. For example, should you be surfing through web pages of a particular business, Cortana will be able to show opening times, contact information and more.
The video provides an idea as to how integrated the assistant is, whether it be in the address bar or pulling down data from searches. Microsoft also showed Spartan running on Windows 10 for phones at Mobile World Congress.