Microsoft has confirmed that Project Spartan, its code name for the new web browser that will be included as part of Windows 10, won't be made available in the next public preview build of the OS, which is expected to be released sometime in the next week. However, the preview build will "have lots of updates to the new web rendering engine that Spartan will use."
Some members of the Windows Insider Program got access to the new rendering engine that Spartan will use in November in the last public build of Windows 10. Microsoft stated today, "Since that time, we've received over 12,000 feedback reports through the smiley face icon alone. This new build has over 2000 changes to the new platform, largely influenced by that feedback."
Microsoft also confirmed earlier rumors that the older Internet Explorer web browser will be included as part of Windows 10 alongside Spartan. It stated:
"Spartan provides compatibility with the millions of existing enterprise web sites designed for Internet Explorer. To achieve this, Spartan loads the IE11 engine for legacy enterprise web sites when needed, while using the new rendering engine for modern web sites. This approach provides both a strong compatibility guarantee for legacy enterprise web sites and a forward looking interoperable web standards promise".
"We recognize some enterprises have legacy web sites that use older technologies designed only for Internet Explorer, such as custom ActiveX controls and Browser Helper Objects. For these users, Internet Explorer will also be available on Windows 10. Internet Explorer will use the same dual rendering engines as Spartan, ensuring web developers can consistently target the latest web standards."