'Project Spartan' in Windows 10 will use new rendering engine, while IE 11 will remain the same

Microsoft has now decided that "Project Spartan", the code name for their next-generation web browser for Windows 10, will also be the only browser that will use the company's new web rendering engine. Internet Explorer 11 will keep the same engine for Windows 10 that it currently has for Windows 8.1.

Originally, the plan was for IE11 to have both a legacy engine and the new engine for Windows 10, but Microsoft announced today that, based on feedback from Windows Insiders testers and others, it had decided to only use the new rendering engine for Project Spartan. The company outlined the reasons for this decision in a blog post:

  • 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.

Microsoft also announced that it will hold a special Windows 10 Web Platform Summit that will be open to the public on May 5-6 at the company's Silicon Valley campus in Mountain View, CA.

Source: Microsoft (opens in new tab)

  • Old news
  • Currently IE is using Edge and Trident this says they've decided against using the hybrid approach in Win 10
  • K
  • It's this very old news?? We knew this from the beginning didn't we?
  • No. The official source date is today
  • No. Initially it was planned for IE11 to ship with Edge and Trident, Spartan also Edge and Trident where as the only difference is that IE11 supports ActiveX, plugs and some other random insecure crap but this change means that Spartan will be 100% Edge and IE 100% Trident, there will be no legacy support in Spartan anymore and IE11 on W10 is not going to have Edge, which is currently the case.
    However, based on strong feedback from our Windows Insiders and customers, today we’re announcing that on Windows 10, Project Spartan will host our new engine exclusively. Internet Explorer 11 will remain fundamentally unchanged from Windows 8.1, continuing to host the legacy engine exclusively.  
  • This.
  • That last bullet point is highly disconcerting to me; Spartan needs to be perceived as totally different from internet explorer.
  • Reread it. They're making changes because consumers and developers couldn't tell the difference between the two.
  • Exactly?
  • They were including both rendering engines in both browsers previously -- now they will move forward with ONLY the new shiny in Spartan and ONLY the old flabby in IE. This should make things a bit more clear.
  • They couldn't tell the difference because people who were using ie11 had the new rendering engine that will be in Spartan. Get it? At first it was perceived that the new rendering engine (which currently is on ie11 and Spartan) won't be able to render legacy websites but now that's not the case. It can render. The new engine is that powerful. So it shouldn't be disconcerting. You should be excited.
  • Spartan won't be able to render legacy sites. It will use the edge engine which has removed all teh legacy crap. IE while use the same trident engine it uses today and will render legacy sites. You will need to launch IE if you need compatability mode.
  • That's why Microsoft is working with Adobe
  • I'm pretty sure I submitted feedback about this too. It makes sense really.
  • From the average Joe perspective, it sure does.
  • Honestly, I think to keep it simple, they could just have the one browser as Spartan. Then, for Enterprise, make a shortcut for "Internet Explorer" and when clicked on, it launches Spartan with an IE theme and IE rendering engine. Otherwise, it's going to be like dual control panels. Plus, in future versions of Windows will they ever update IE 11 or what? Posted via Windows Phone Central App
  • That's not how it works, Spartan doesn't supprt  plugins or activex and some other weird things, it literally CAN NOT work as IE11 ever would which is why IE11 needs to be there. What they have to do is actually deactivate IE11 as feature on Pro and Enterprise as default (it's activated per default, so doing the reverse, voila) and on Home it may even need to get removed. IE11 is the compatibility browser, that's all there is to it. Update your shit and use Project Spartan, don't update your shit and use IE11, that's all there is to it. Consumers will use Spartan, some enterprise people will have to use IE11 which is why it may make sense to actually include Edge to IE11 but do some changes so "normals" never see it and ship Spartan with only Edge.  
  • Ok makes sense. Posted via Windows Phone Central App
  • actually they will remove the Edge from IE11.. because they want it to work exactly it is working in Win7/Win8.1 "...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" Spartan=Edge / IE11 = Legacy
  • I hope removing from home never happens. Bury it but leave it available. Some of us home users have work apps we need to access via home computers. Many enterprise apps are still IE only. I don't want to drag my laptop home or vpn in just to get at IE.
  • @Storl, That would be a silly approach as it just completely alienates people who work from home time to time & have to use IE for work. Certain web-based CRM solutions only work with IE.
  • Making Spartan with only one engine it's better because they don't have to keep testing if the legacy engine is working when they add new features. And adding the new engine to IE11 could "broke" the legacy sites that was working before.. that's why they are deciding to split all (Spartan with new engine / IE11 legacy engine ). The default browser will be Spartan for all Windows 10 users... if a company needs they can create IE shortcuts for sites that need it or change the default browser of users to IE11.. but this IE11 will be the same of win7/win8.1 IE11 (Ibelieve they will update only with security patchs )  
  • Im curious about this aswell as they've always updated their cpu encryption for it with every new os
  • IE will probably get security patched, but I doubt it will ever be updated. It is a legacy browser. You only should open it if you have a web site designed for the IE and it doesn't work in Spartan. There is no reason to waste resources updating legacy software that will have fewer and fewer users over time.
  • It will continue to receive the same level of service as Windows 8.1 and Windows 7. This is based on the "need it to be the same" comment from the article.
  • So is there any word when the next build for will come out? Which is suppose to have Project Spartan.
  • Probably not before Build, end of April.
  • Spartan browser is the next big thing... Google chrome will die.. My predictions.. Content of you agree.
  • I agree
  • In your dreams. Posted via the Windows Central App for Android
  • Shut up you bloody android user
  • Live long and prosper internet explorer !
  • It's ridiculous to offer two different browsers.
    Microsoft should replace Internet Explorer by Spartan and allow a "compatibility mode" with a switch (as private mode)
  • this could be a good move, but if they do this, ie/spartan would eat much more space and possible resources too. ie11 wont be used by consumers on w10 anyway, but by corporate. corporate users know better than average joe what they need so no confusion at all. what i believe is that w10 for consumers wont have ie 11 installed at all. just spartan. only enterprise version of w10 will have ie11 too.
  • Then they could just retain IE, because this is how IE11 works. No, we need a browser app with a solid real-world rendering engine and no hassle about activeX. IE should only be used if Spartan cannot render a legacy page. Maybe, Spartan should warn you accordingly, if object-tags are used.
  • good move
  • I read that as:
    "The new browser that was created for a new rendering engine is using a new rendering engine"
  • Project Spartan. It is an independent browser available for independent download along side Opera, Safari, Firefox and the rest or is it tightly bundled and or integrated with Windows 10 like Internet Explorer is now? Does anyone know?
  • Microsoft knows. Oh and some Russian/Chinese people that constantly leak that sort of thing.
  • It's an app in the store, so its not integrated.
  • It will be a Universal App for any Windows 10 device.
  • I keep reading different stories about this so I wonder if anyone really knows anything.  WMPoweruser is reporting that Spartan doesn't support extentions are rumored to be coming in the future.  These stories are all over the place. http://microsoft-news.com/rumor-project-spartan-currently-doesnt-support...
  • Ok then
  • Sure hope Spartan ships as a native application.  No Universal App is going to replace Firefox :S
  • When can we test Spartan?  Is this available in the app store now? 
  • What about ADblock? Is there feature like this inside, or can I instal it to spartan?