IEBlog

Internet Explorer Team Blog

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    HTTP/2: The Long-Awaited Sequel

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    Ready to speed things up? Here at Microsoft, we’re rolling out support in Internet Explorer for the first significant rework of the Hypertext Transfer Protocol since 1999. It’s been a while, so it’s due. While there have been lot of efforts to streamline Web architecture over the years, none have been on the scale of HTTP/2. We’ve been working hard to help develop this new, efficient and compatible standard as part of the IETF HTTPbis Working Group. It’s called, for obvious reasons, HTTP/2...
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    Certificate reputation, a novel approach for protecting users from fraudulent certificates

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    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

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    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

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    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

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    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

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    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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    IE7 Dialog Sizes - A Quick Update

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    This is just a follow up to my recent post about dialog sizing in IE7 . Based on your feedback regarding the minimum dialog height restrictions, my team re-evaluated our position and changed the minimum height from 150 to 100 pixels. We think this change: Reduces application compatibility issues where dialogs were coded to the IE6 minimum height Is more consistent with other browsers’ minimum height providing more consistency for content developers Again, we appreciate your constructive...
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    RSS Secure by Design

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    One of the reasons we went to Blackhat last month was to show how the Security Development Lifecycle (SDL) has changed the way that Microsoft builds products. I talked about how we’re reducing attack surface with features like ActiveX opt-in, improving code quality and building-in Defense in Depth with Protected Mode . I didn’t get a chance to cover the new RSS feed support but I think the RSS team’s work is a great example for anyone building a new client to handle RSS feeds and a case study in...
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    Happy Holidays!

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    The information published in this post is now out-of-date. —IEBlog Editor, 20 August 2012 I want to comment on a couple of things before we all disappear for the holidays. As you may have noticed, we have turned on comment moderation due to the copious amounts of blog spam we have gotten lately. This means there will be some delay for us to review the comments and then post the ones that are not spam. I don’t really like doing the comment filtering (it’s more work for us), but given the spam...
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    Inside The CSS Working Group

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    The IE team is active on several W3C working groups such as SVG and HTML . As one of our three regular CSS Working Group (CSSWG) representatives, I wanted to follow up on the latest face-to-face meeting the group held at Apple in Cupertino at the end of last month by sharing some of the work and progress being made. While it aims to be representative of the three-day meeting, the list below is not exhaustive. CSS2.1 and the CSS test suite: the working group discussed many of the remaining open...
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    Getting to SVG 2.0: A report from the SVG Working Group Face-to-Face (May 24th – June 1st 2010)

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    After months of conference calls, the most recent face to face meeting of the SVG Working Group helped us make progress on this web standard. The biggest ‘news’ from this meeting was the group’s decision to take the next step to finish the current SVG proposal – “SVG 1.1 2nd Edition” – and send it as a Proposed Recommendation to the W3C Advisory Committee for final endorsement. We also started more serious conversations about SVG 2.0. As the Web has advanced...
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    The tastiest dog food yet

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    This post is intended for IT administrators, but more technical users might also find it useful. During Internet Explorer 8 development we paid very close attention to Line of Business (LOB) application compatibility for large enterprises. We want IE8 to be an easy drop-in replacement for earlier versions of IE, so that all users can benefit from the improved speed, security and ease of use of IE8. Like Microsoft, your organization probably depends on a very large number of Line of Business...
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    Online Tracking, Consumer Protection, and Web Standards

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    Today, the W3C announced the creation of a Tracking Protection Working Group to work on defining what tracking is, signaling user intent, and tracking protection lists. The W3C’s action here can help protect consumers from unwanted tracking. We welcome the opportunity to work with the industry and governments on a Web standard based on our earlier work. The Tracking Protection feature in IE9 provides a way for consumers to benefit today by restricting which sites on the Web get information from...
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    Velocity 2011: The Performance Impact of Modernizing Internet Explorer

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    Velocity 2011: The Performance Impact of Modernizing Internet Explorer Browsers need amazing performance to deliver on the promise of HTML5 applications. Modernizing Internet Explorer 9 has changed what’s possible with Web sites, and dramatically improved the performance of the HTML4 sites consumers use today. To demonstrate the real world performance gains in IE9 at the recent Velocity 2011 conference, we presented our talk on Modernizing Internet Explorer as an interactive HTML4 Web application...
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    Using PC Hardware more efficiently in HTML5: New Web Performance APIs, Part 1

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    Browsers need amazing performance to deliver on the promise of HTML5 applications. Web developers need API’s to efficiently take advantage of modern PC hardware through HTML5 and build high performance Web applications with efficient power use for great, all around customer experiences. The second IE10 Platform Preview supports three emerging API’s from the W3C Web Performance Working Group which enable developers to make the most of the underlying hardware and use battery power more...
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