IEBlog

Internet Explorer Team Blog

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    ECMAScript, Fifth Edition Candidate Specification Announced

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    Yesterday was a significant milestone in the web’s continuing evolution—the announcement of ECMAScript, Fifth Edition Candidate Specification (formerly known as ECMAScript 3.1 back when I last mentioned it ); the “Candidate Specification” stage is the last stop on the road to becoming a final standard. Read more about it on the Jscript blog ! This is a great achievement and paves the way for enhanced web programming scenarios in all browsers. I’d also like to personally thank Allen and Pratap...
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    Meet WOFF, The Standard Web Font Format

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    On April 8, 2010, Mozilla, Opera and Microsoft submitted the WOFF File Format 1.0 specification to the W3C. The submission was published on Monday, April 19 at http://www.w3.org/Submission/2010/03/ . Browser vendors and a growing number of type foundries now agree on a common encoding format for web fonts, thus closing an era of cross-browser incompatibility that began when IE4 and Netscape 4 first added support for downloadable fonts in 1997. At the time, both Microsoft and Netscape implemented...
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    IE8: Nine Things You Didn't Know You Could Do

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    Our typical posts here are original information about the product from the people who built the product. This morning, I ran across a well-written article from PC Magazine with “some tips about features that you may not have noticed” in IE8. We try to post a lot of useful information on this site (e.g. Session Cookies, sessionStorage, and IE8 or “How can I log into two webmail accounts at the same time?” ) and it’s both exciting and humbling to see professional writers take it a step further....
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    W3C HTML Working Group Publishes New Drafts

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    Last week, the W3C HTML Working Group reached a decision to publish several new working drafts and these are now available. The discussion about what to publish and how to structure the HTML5 specification has taken several months. In November, at the TPAC meeting , a request was made for the Microdata section of the specification to be removed. Back in August, I posted about our support for a separate Canvas 2D API specification. Some people in the community raised concerns about exactly what...
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    CSS Crunch: new IE Extension for developers

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    There are many tools in the market that allow you to customize your pages' cascading style sheets (CSS), but there are actually a very few that do the opposite—scan for all the CSS rules in the document and remove those that are not used. Cleaning out the CSS will not only reduce the bandwidth impact, but will also improve the performance of the browser (minimizing the time spent by the CSS engine to parse the style sheets). In this post, I will describe how to build that tool using a bookmarklet...
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    A More Compatible IE9, Through Your Feedback

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    Throughout IE9, we have written about how users and developers expect browsers to be compatible with the sites they use every day. This blog post covers a few ways we measure and ensure compatibility with the Web and how your feedback made a difference . Measuring compatibility with the Web We measure Web compatibility through many different mechanisms. These include: Customer feedback: Most important, we listen and act on feedback from the community. With 33...
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    Asynchronous Programming in JavaScript with “Promises”

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    Asynchronous patterns are becoming more common and more important to moving web programming forward. They can be challenging to work with in JavaScript. To make asynchronous (or async) patterns easier, JavaScript libraries (like jQuery and Dojo) have added an abstraction called promises (or sometimes deferreds). With these libraries, developers can use promises in any browser with good ECMAScript 5 support. In this post, we’ll explore how to use promises in your web applications using XMLHttpRequest2...
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    IE10 Compat Inspector

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    Compat Inspector is now available for IE10. Use Compat Inspector to quickly identify if Internet Explorer platform changes affect your site. Whether you're preparing for IE10 or still updating for IE9, run Compat Inspector on any page experiencing problems. Then watch for messages explaining potential issues and steps you can take to resolve them. About Compat Inspector Compat Inspector is a JavaScript-based testing tool that analyzes your site while it runs. Compat Inspector...
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    Web Platform Docs Debuts with Developer Resources

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    Today, we are taking another step forward in helping developers achieve the goal of interoperability through same markup. We’re happy to be part of creating Web Platform Docs (WPD) , a new W3C hosted community resource for developers and designers who use open Web standards. For developers the Web is about building great experiences with the potential to reach millions of people around the world by writing interoperable sites and applications. We’ve talked many times about the promise of interoperability...
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    February 2014 Internet Explorer Updates

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    Microsoft Security Bulletin MS14-010 - Critical This security update resolves twenty-three privately reported and one publicly disclosed 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. An attacker who successfully exploited the most severe of these vulnerabilities could gain the same user rights as the current user. Users whose accounts are configured to have fewer user...
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    Certificate reputation, a novel approach for protecting users from fraudulent certificates

    • 17 Comments
    At the IETF in London last week, we presented a proposal called Certificate Reputation for detecting fraudulent certificates, in order to protect you from attackers that could have stolen a site’s identity. This prevents malicious sites from phishing your personal information like passwords, bank account numbers, credit card numbers etc. Recent attacks against public and Microsoft CAs (e.g. the DigiNotar and Comodo attacks) led us to develop mechanisms that protect you from such threats. Background...
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    Spring Forward: Advancing Historical Date and Time Calculations on the Web

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    Spring Forward: Advancing Historical Date and Time Calculations on the Web Web developers want to create world-ready applications to reach a global audience. Internet Explorer 10 brings the historical Daylight Saving Time, already available on the underlying OS, to the Web developer. This enables apps and sites to interact with historic dates and times across various time zones more accurately. Earlier this year we explored the emerging ECMAScript Internationalization APIs that will enable...
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    IE 9.0.4 Available via Windows Update

    • 17 Comments
    The December 2011 Cumulative Security Update for Internet Explorer is now available via Windows Update . This security update resolves three privately reported vulnerabilities in Internet Explorer. The most severe vulnerabilities could allow remote code execution if a user visits a specially crafted Web page using Internet Explorer. An attacker who successfully exploited this vulnerability could run a malicious application on the affected system. Users whose accounts are configured to have fewer...
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    Debugging Web Workers in IE10

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    With Web Worker s, Web applications can be more responsive by offloading long-running, complex JavaScript algorithms to run in the background. IE10 includes a complete and predictable debugging experience for JavaScript executing within both the Web page and in Web workers. In IE10, we’ve enhanced the F12 tools to be aware of the new script contexts created for every Web worker. When you start debugging (by clicking the Start debugging button within the F12 tools), you’re attaching to...
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    Add-on Performance Part 3: Optimizing Add-on Startup Performance

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    In the first post of this series, we described how add-ons can decrease IE’s performance during tab creation. Many users with add-ons enabled have noticed a performance improvement when they open new tabs after disabling their add-ons. We also walked you through how to measure add-on performance and identify areas of impact using the Windows Performance Tools . In this post, we delve into methods and best practices developers can use to improve their add-ons’ start-up performance,...
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    MIME-Handling Changes in Internet Explorer

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    Each type of file delivered from a web server has an associated MIME type (also called a “content-type”) that describes the nature of the content (e.g. image, text, application, etc). Back in Internet Explorer 8, we made a few changes to IE’s MIME-sniffing feature that attempts to determine the actual content-type for each downloaded resource. In this post, I discuss how recent changes to IE further improve MIME-handling and make browsing more secure. Certain HTML elements (LINK and SCRIPT in particular...
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    Performance: Profiling how different web sites use browser subsystems

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    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 of five real world websites. We use Internet Explorer 8 for this analysis, and as IE9 approaches we...
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    Installing Branded IE7 on Windows XP Service Pack 3

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    Hi all, Last week, I blogged about installing Windows XP SP3 and how it affects different versions of Internet Explorer (See my earlier blog post here ). Today I will be discussing installing branded/custom versions of IE7 on machines with Windows XP SP3 installed. This post is primarily aimed towards folks who use the Internet Explorer Administration Kit 7 (IEAK7) to create custom IE7 packages, like Internet Service Providers (ISPs) and web developers. If you ever installed the IEAK7, built a...
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    IE April Security is Now Available

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    The IE Cumulative Security Update for April 2008 is now available via Windows Update . Alternatively, you can receive this and all other Microsoft updates via the new Microsoft Update . I encourage you to upgrade to Microsoft Update if you haven’t already to ensure that you receive the latest updates for all Microsoft products. This update addresses 1 remote code execution vulnerabilities. This security update addresses this vulnerability by modifying the way Internet Explorer handles HTML and...
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    IE October Security Update Now Available

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    The IE Cumulative Security Update for October 2008 is now available via Windows Update . Alternatively, you can receive this and all other Microsoft updates via the new Microsoft Update . I encourage you to upgrade to Microsoft Update if you haven’t already to ensure that you receive the latest updates for all Microsoft products. This update addresses six vulnerabilities. The security update addresses these vulnerabilities by modifying the way that Internet Explorer handles the error resulting...
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    The RSS Platform IE8 User-Agent String

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    Hello! Just a quick note on some important information just posted to the RSS team blog . The RSS platform is introducing an updated User-Agent string for use with Internet Explorer 8. Check out the details in Walter’s latest post . Kristen Kibble Program Manager
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    IE Automatic Component Activation Now Available

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    The IE Automatic Component Activation (IE ACA) update is now available as part of the April 2008 Internet Explorer Cumulative Update . The "click to activate" behavior, formerly required for ActiveX controls embedded in some webpages, is now permanently removed from Internet Explorer. For detailed information on IE ACA, see our blog post from last November announcing this update. This update replaces the IE ACA previews released in December 2007 and February 2008. Thanks, Jefferson Fletcher...
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    Extended Validation (EV) SSL and Small Businesses

    • 17 Comments
    I’m Markellos Diorinos, and I am a product manager with the Internet Explorer team. Yesterday I read a story in the Wall St. Journal about how some small businesses, such as the featured Aunt Joy, will receive a lump of coal this Christmas, as they are unable to get the new EV SSL Certificates. Kelvin and Rob have previously discussed EV Certificates, but I wanted to share some of my thoughts with you. Just like regular SSL certificates, EV SSL certificates will only be used when sensitive information...
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    Using Outlook Web Access (OWA) on IE7 and Windows Vista

    • 17 Comments
    Hi, I’m B. Ashok, the Product Unit Manager for Web Development Tools . As mentioned in my earlier post last summer, we have removed the DHTML Editing Control from Windows Vista as part of making the operating system more secure. One application that used the DHTML Editing Control in the past was OWA (Outlook Web Access). We have issued a required update to both Exchange 2000 and 2003 that enables OWA support for IE7 in Windows Vista. However if your server does not have this update applied, you...
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    More Thoughts on Measuring Anti-Phishing Accuracy

    • 17 Comments
    Some of you may have seen stories comparing IE7’s anti-phishing accuracy with our competitors, citing different studies than the one I blogged about earlier that showed IE7’s Phishing Filter had the best overall accuracy. Paul Robichaux, from 3Sharp (the company that ran the study I cited), provides his initial take on this other study here . Tony Chor Group Program Manager
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