Braindump: Feature Control Keys and URLActions

Note: The “brain dump” series is akin to what the team calls “Fast Publish” articles—namely, things that are published quickly, without the usual level of polish, triple-checking, etc. I expect that these posts will contain errors, but I also expect them to be mostly correct. I’m writing these up this way now because they’ve…


Brain Dump: Random Tidbits

This post contains random IE-related tidbits for which there’s either not enough material or time to write a full post. I expect to revisit and expand this list from time to time. Case-Sensitivity in Cross-Frame Scripting of File URIs Same-Origin-Policy controls how script running in web pages may interact with other pages. Normally, in IE,…


HTTPS and Keep-Alive Connections

As we explore network performance on the “real-world web”, one bad pattern in particular keeps recurring, and it’s not something that our many IE9 Networking Performance Improvements alone will resolve. The bad pattern is the use of Connection: close semantics for HTTPS connections. In this bad pattern, a website allows only a single request and…


Why doesn’t Flash/Silverlight work in my .NET Application?

Over the past few months, I’ve run across a number of developers who have reported problems where their .NET application fails to render Flash or Silverlight content within a Web Browser Control. The most common reason for this problem is that .NET, by default, compiles with a target of AnyCPU, which means that your application…


In-Place Shell Navigation with the WebBrowser Control on Windows 7

Because the WebBrowser Control (WebOC) can be used to display a wide range of content (HTML, Office Documents, PDFs, the local file-system, etc) it is often integrated into applications as a somewhat generic object hosting surface. For Windows 7, a small change was made that will impact applications that use the WebOC to allow the…


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. I (and others) have written a lot about the UA string over the years….


Preventing Automatic Hyperlinking in ContentEditable HTML

Today, a question from the mail bag… Q: Is there a way to stop IE from “auto-magically” recognizing and creating hyperlinks inside HTML? First, a bit of context. Web developers can use the ContentEditable property to allow users to edit part of a HTML page. This mechanism is often used to allow users to edit…


WebOCs, popups, and the default browser

Applications which host the WebOC (Web Browser control) may choose to support popups and new windows by hooking the NewWindow3 event and returning in ppDisp a pointer to a new, hidden, non-navigated WebBrowser object or InternetExplorer object.  If such an interface is returned, the browser so provided will handle the new window navigation. On the other…