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Friday, November 27, 2009 8:37 PM

The JVM Install Prompt

Many years ago, Microsoft developed an implementation of a Java Virtual Machine to run Java content. Internet Explorer 5 included code that would download and install the JVM (if needed) when a user encountered Java content on the web. After some time,
Posted by EricLaw | 1 Comments
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Sunday, November 22, 2009 8:54 PM

Troubleshooting Authentication with Fiddler

Over the last few weeks, I’ve been exchanging mail with a webmaster (Vladimir) in Russia who reported that his customers were having problems using IE8 on Windows 7 to log into his website. His site uses HTTP Basic Authentication, so users are prompted
Posted by EricLaw | 2 Comments
Wednesday, November 11, 2009 8:30 AM

Inline AutoComplete

Internet Explorer 8 removed support for one of my favorite browser features: Inline AutoComplete (IAC) for the address bar. This feature was off-by-default, but for almost a decade the first thing I did when setting up a new computer was enable IAC using
Posted by EricLaw | 0 Comments
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Tuesday, October 13, 2009 10:53 PM

Using Meddler to Simulate Web Traffic

As mentioned back in July , IE8’s new lookahead downloader has a number of bugs which cause it to issue incorrect speculative download requests. The “BASE Bug” caused the speculative downloader to only respect the <BASE> element for the first speculatively
Posted by EricLaw | 3 Comments
Monday, October 12, 2009 12:01 PM

Capturing Crash Dumps for Analysis

Sometimes, folks report crashes to the IE team that we are unable to reproduce internally. That’s usually because, as mentioned often, most crashes are caused by buggy browser add-ons. In some cases, however, crashes occur even when running with browser
Posted by EricLaw | 1 Comments
Saturday, October 10, 2009 4:51 PM

Understanding DEP/NX

Despite being one of the crucial security features of modern browsers, Data Execution Prevention / No Execute (DEP/NX) is not well understood by most users, even technical experts without a security background. In this post, I’ll try to provide some insight
Posted by EricLaw | 4 Comments
Thursday, October 08, 2009 3:19 AM

The User-Agent String: Use and Abuse

When I first joined the IE team five years ago, I became responsible for the User-Agent string. While I’ve owned significantly more “important” features over the years, on a byte-for-byte basis, few have proved as complicated as the “simple” UA string.
Posted by EricLaw | 12 Comments
Friday, October 02, 2009 10:55 PM

Internet Explorer Cannot Download https://something

Earlier today, I was asked to troubleshoot a secure site where file downloads were always failing. Having seen this problem many times often over the years, I immediately suspected that the web developer wasn’t aware that if a user tries to download *
Posted by EricLaw | 14 Comments
Friday, September 11, 2009 3:46 AM

Why Won’t IE8 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
Posted by EricLaw | 18 Comments
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Friday, August 21, 2009 11:50 PM

My browser is acting funny…

As browser users go, I’m pretty savvy. I’ve been on the IE team for nearly half a decade, and I’ve been writing browser extensions for twice as long. I read networking source code for entertainment, I spend my free time writing a web debugger , and I
Posted by EricLaw | 23 Comments
Monday, July 27, 2009 5:49 PM

Bugs in IE8's Lookahead Downloader

Internet Explorer has a number of features designed to render pages more quickly. One of these features is called the "lookahead downloader" and it's used to quickly scan the page as it comes in, looking for the URLs of resources which will be needed
Posted by EricLaw | 80 Comments
Friday, June 19, 2009 5:46 PM

IE8 Problem Reports: ASP.NET Menus show blank/white

Q: My ASP.NET site's menus show as blank/white when my page is rendered in IE8 standards mode. The menus only work if I turn on compatibility view. What's up with that? A: This is actually a standards-compliance bug in the ASP.NET framework. A fix for
Posted by EricLaw | 0 Comments
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