Today, Paul Rouget pointed out that the Firefox 3.5 for developers page didn’t mention the newly-implemented createImageData() method.
While looking for the right place to add documentation for that method, I realized that we had no documentation at all for using the ImageData object to manipulate pixel data in a canvas. So I settled in and wrote Pixel manipulation with canvas.
This is one of those times when documenting a new feature (the createImageData() method) led to writing content about previously existing features (all the other ImageData methods). Everybody wins!