Another U-Turn From Microsoft: Project Spartan Will Host New Rendering Engine Exclusively, IE11 Will Remain Unchanged

Windows 10 Project Spartan

Back in January, Microsoft announced their next generation web browser platform with a new browser codenamed Project Spartan. At that time, Microsoft announced that their new rendering engine with modern web capabilities and legacy engine will be part of both Project Spartan and IE11 on Windows 10. This allowed both browsers to switch back to their legacy engine when they encounter legacy technologies or certain enterprise sites. However, based on strong feedback from their Windows Insiders and customers, Microsoft is announcing that on Windows 10, Project Spartan will host their new engine exclusively. Internet Explorer 11 will remain fundamentally unchanged from Windows 8.1, continuing to host the legacy engine exclusively.

Why this change?

  • Project Spartan was built for the next generation of the Web, taking the unique opportunity provided by Windows 10 to build a browser with a modern architecture and service model for Windows as a Service. This clean separation of legacy and new will enable us to deliver on that promise. Our testing with Project Spartan has shown that it is on track to be highly compatible with the modern Web, which means the legacy engine isn’t needed for compatibility.
  • For Internet Explorer 11 on Windows 10 to be an effective solution for legacy scenarios and enterprise customers, it needs to behave consistently with Internet Explorer 11 on Windows 7 and Windows 8.1. Hosting our new engine in Internet Explorer 11 has compatibility implications that impact this promise and would have made the browser behave differently on Windows 10.
  • Feedback from Insiders and developers indicated that it wasn’t clear what the difference was between Project Spartan and Internet Explorer 11 from a web capabilities perspective, or what a developer would need to do to deliver web sites for one versus the other.

Read more about it here.

Read more about it here.