Microsoft has released Internet Explorer 11 with the recent Windows 8.1 Preview. The new browser promises to offer improved performance, faster page load times, new standards support for next generation sites, and completely revised F12 developer tools.
The Developer Preview of IE11 on Windows 7 is available for
With IE11 for Windows 7 Developer Preview allows makes it easier for developers
to build Web content that will eventually be available to over 700 million
Windows users. Microsoft is also providing an update to modern.IE, including a
new cross-browser Web site screenshot service and new virtual machine images.
Microsoft optimized the IE11 browsing engine for real-world sites to download
and display fast and be highly responsive and interactive.
IE11 is the first browser to natively decode JPG images in real-time on the GPU,
so pages load faster and use less memory, reducing power consumption and
improving battery life. IE11 is also the first browser to render text on the
GPU. Text and images are the heart of the Web, and accelerated text and JPG
performance impacts nearly every page you see.
IE11 implements the W3C Resource Priorities standard enabling developers to
specify which parts of the page are important and need to be loaded first. IE11
also supports HTML5 link prefetching and pre-rendering, so developers can help
the browser anticipate where you?ll go next and get those pages ready.
Internet Explorer 11 also promises to offer leading performance with Microsoft's
including polymorphic caching of properties and inlining of function calls, so
Garbage collection now utilizes the background thread more efficiently,
substantially reducing the frequency and amount of time the UI thread is blocked
doing garbage collection.
IE11 also includes support for the well-defined and commonly used features of
the emerging ECMAScript 6 standard. IE11 supports features including let, const,
Map, Set, and WeakMap, as well as __proto__ for improved interoperability. IE11
also supports the ECMAScript Internationalization API (version 1.0), which
enables culture aware sorting, number formatting, date and time formatting to be
benchmarks like WebKit SunSpider continues to lead compared with latest version
of other browsers. On Windows 7, IE11 is 4% faster than IE10, and nearly 30%
faster than the nearest competitive browser, Microsoft claims.
IE11 also includes a re-designed and enhanced suite of in-browser F12 developer
tools. The new F12 supports the fast, iterative workflow used by modern Web
developers. F12 helps developers get from problem to solution quickly with
actionable data, enabling fast and fluid Web experiences. The F12 tools include:
- UI Responsiveness and Memory Profiling tools that help developers diagnose and
fix performance issues
- Live DOM Explorer and CSS inspection tools that update with the page so
developers can iteratively explore how IE is laying out and rendering Web
can get to work more quickly
Internet Explorer 11 supportsmore HTML5 and CSS properties, including Canvas 2D
enhancements (image smoothing, fill rules, dashed lines), CSS border-image
support, Device fixed positioning, mutation observers, updated Pointer Events
and CSS Flexbox support, and more. It also improves existing features. For
example, IE11 includes extensive improvements to the built-in text editor.
Microsoft's engineers have also added support for pasting images, a full-
featured undo stack, and enhanced touch keyboard and international character
For consumers, these changes mean that more sites will work better in the latest
version of IE. For developers, these changes mean building great interoperable
experiences with less browser-specific code.
You can find a full list of new functionality available to developers in the
IE11 Developer Guide here