A look at Internet Explorer from the inside out. Note: @EricLaw left Microsoft in 2012, but was named an IE MVP in 2013.
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Strict P3P Validation
Internet Explorer offers users many tools to help protect their privacy, including InPrivate Browsing , cookie controls (including P3P ), and Tracking Protection Lists . In February of 2012, the IE team described how a misleading P3P statement was being used to circumvent users’ privacy settings...
16 Oct 2013
A Quick Look at P3P
Internet Explorer supports a cookie-restricting privacy feature called P3P. Web developers often get tripped up by it because no other browser implements the P3P standard. I’ve written about IE’s cookie control features previously (and more comprehensively), but here’s a summary of...
17 Sep 2013
The Intranet Zone
Internet Explorer maps web content into one of five security zones. After the Local Machine Zone, the Local Intranet Zone is probably the most misunderstood of the Zones, and is a common source of confusion and compatibility glitches. Mapping into the Local Intranet Zone For the Trusted and Restricted...
5 Jun 2012
Understanding Enhanced Protected Mode
Last week, Andy Zeigler announced the introduction of Enhanced Protected Mode (EPM) over on the IEBlog. In today’s post, I’d like to provide further technical details about EPM to help security researchers, IT professionals, enthusiasts, and developers better understand how this feature works...
23 Mar 2012
Internet Explorer 9.0.2 Update
Tuesday’s Update for Internet Explorer updates the IE9 Help > About dialog’s version number to v9.0.2. The update includes a number of security and functionality fixes; many of these fixes are described in the More Information section of KB2559049 . One fix enables the IE9 Download Manager...
12 Aug 2011
Beware Cookie Sharing in Cross-Zone Scenarios
Note: I mentioned this problem before ( Troubleshooting Login Cookies #3 ) but it was buried in a long post and this is an issue that lots of folks inside Microsoft hit, so I’m pulling it out into its own post. The Problem From time to time, various users have complained to the IE team that...
10 Mar 2011
Understanding Cookie Controls
Internet Explorer offers an extremely rich set of options for controlling cookies . The default settings are fairly well-balanced, but some users may want to introduce more restrictive or specialized controls. To configure cookie settings in IE, click Tools > Internet Options . Click the Privacy...
5 Jun 2010
Understanding Session Lifetime
Back in May of last year , I discussed changes we made in Internet Explorer 8 to make the browser’s session handling behavior more predictable. Specifically, we introduced a “New Session” item on the File menu—this menu item explicitly creates a new browser session which doesn’t share session information...
4 Apr 2010
Understanding Domain Names in Internet Explorer
Web browsers use domain names for a variety of purposes, but how they’re used is much more complicated than most developers realize. In this post, I’ll attempt to cover the most important aspects of this topic. Definitions When talking about “domains” the terminology alone...
18 Sep 2009
Why Won’t IE Remember My Login Info?
Over on the Microsoft Answers forum , some folks have reported that Internet Explorer doesn’t remember their login details. This is a tricky problem to troubleshoot because there are a number of different problems which get lumped together under this description, and there are a number of different...
10 Sep 2009
Internet Explorer Cookie Internals (FAQ)
Over the five years I’ve worked on Internet Explorer, I’ve probably seen more questions from the community about HTTP cookies than on any other topic. Cookies are an integral component of most websites in use today, and hence problems or unexpected behaviors with cookies tend to get a lot...
20 Aug 2009
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