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DOM Traversal
The latest Platform Preview Build includes two great interoperable features for working with the DOM – DOM Traversal and Element Traversal. These features provide web developers with simple, flexible, and fast ways of traversing through a document using the same markup across browsers. These features come in the form of flat enumeration, simplifying the DOM tree to an iterative list, and fil...

Add-ons, and Opting out of Google Analytics Without Them
Recently, Google made available the “Google Analytics Opt-out Browser Add-on.” This add-on enables consumers to “indicate that information about the website visit should not be sent to Google Analytics.” We agree that making it easy for consumers to protect their privacy is good, and Internet Explorer offers a variety of features to help keep you in control of your informat...

Performance: Profiling how different web sites use browser subsystems
When we first showed IE9 at the Professional Developers Conference last fall, we discussed how real world browser performance involves many different subsystems. Different websites use these subsystems in different ways, and to build a fast real world browser you have to start by understanding these overall patterns. This post provides an inside look at how these subsystems impact the performance ...

Microsoft to Co-Chair New W3C Web Performance Working Group
Earlier this morning the W3C announced the formation of a new Web Performance Working Group chartered with making it easier to accurately measure web application performance. Enabling web developers to understand the real world performance characteristics of their applications is critical to the success of HTML5, and we’re excited to have been selected as co-chairs of the new working group a...

Add-ons, Installation Experiences, and User Consent
As discussed in previous blog posts, add-ons can have a material impact on browser performance. IE measures the performance of add-ons so that users can make informed decisions about them. It is important to understand how add-ons arrive on a user’s system to begin with because browser performance is so important to site developers and to consumers. The notification and control that users ha...

IE August Cumulative Security Update Now Available
The IE Cumulative Security Update for August 2010 is now available via Windows Update. This security update resolves six privately reported vulnerabilities in Internet Explorer. The most severe vulnerabilities could allow remote code execution if a user views a specially crafted Web page using Internet Explorer. Users whose accounts are configured to have fewer user rights on the system could be l...

Add-on Performance part 2: Helping consumers make informed decisions
The platform previews show the focus in IE9 on performance, interoperable HTML5 through same markup, and hardware acceleration. We’ve also posted here about the work we’ve done with add-on developers, and we shared some data about add-on performance and how we measure it. In this post, we cover more of our thinking about measuring add-on performance and how to help consumers to stay...

Add-on Performance Part 1: Measuring Add-on Performance
In previous posts, we’ve written about the ways we’re making IE9 much faster, like the new script engine that uses multiple cores, and the new rendering subsystem that uses the dedicated graphics chip found on modern PCs. Another aspect of browser performance involves the external code that IE runs on behalf of users, or add-ons. Add-ons introduce unique features that can enhance th...

JavaScript tests now available on the IE Testing Center
Our commitment to  same markup includes script along with HTML, CSS, SVG, and the other markup that developers use to build the web. To make same markup real, the community needs a set of official tests to assess how interoperable and standards-compliant different browsers are with the latest version of JavaScript, “ECMAScript Fifth Edition” (fondly known as ES5). As we mentione...

Chakra: Interoperability Means More Than Just Standards
How do we decide whether to implement a feature that isn’t included in a standards specification? Like all browser providers, we often have to make this decision. In this post, I’ll use some real-world JavaScript examples to illustrate some of the principles we use to deliver an interoperable browser when the standards specification isn’t enough. In an ideal world, a standards specificatio...

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