I updated the Html Grabber earlier this year in response to some requests at work. It was performing poorly with long documents, and occasionally crashing in a few edge cases. I rewrote a few portions of the core code and created a new shell in .NET.

The core functionality is basically the same. Press and hold the primary mouse button on the button. Then, with the mouse button still pressed, drag and point at a window/region that you believe is using Internet Explorer. If it is, the cursor changes to include a small green circle. You may then release the mouse button to capture the contained HTML.

Once captured, double-click on the capture row and then paste the results into your favorite text editor (ideally, a syntax highlighting editor).

As usual, use at your own risk. It’s designed for debugging, so treat it accordingly. It’s been tested with IE8 and IE9. It requires .NET 4.0. 

Download it here. (Yes, the file name is called v2 … don’t worry, it’s correct). There’s no installer, just run the included EXE.