According to the Windows Blog, Microsoft is working on a new browser called Spartan.
Read below
Introducing Project Spartan: The New Browser Built for Windows 10
Today I’m excited to share more details about “Project Spartan,” the new browser we are introducing in Windows 10. Project Spartan will be available across the Windows 10 device family. It is fast, compatible, and built for the modern Web. Project Spartan is designed to work the way you do, with features enabling you to do cool things like write or type on a webpage. It’s a browser that is made for easy sharing, reading, discovery and getting things done online.
We first shared details about Project Spartan on January 21, and it’s been really gratifying to see so much interest and excitement for our new Microsoft browser. Today, we’re excited to announce that Project Spartan is available for the first time for Windows Insiders to try out as part of the latest Windows 10 Technical Preview build for PCs. You can read more about the new Windows 10 Technical Preview build here, or check it out by joining the Windows Insider Program.