It was like some hours ago i restarted my Firefox to install 2.0.0.10 and just now the new 2.0.0.11 came out. Why it happened so fast? John Resig, the guy behind jQuery, explained why.
Apparently there was a serious bugs, something to do with canvas.drawImage,
The issue was that if the image was corrupted in some way, drawImage would still try to read data from it and display random bits of memory instead (oops).
If you have no idea what this canvas is all about, don’t worry it’s in HTML 5 specification, so there are still view modern browser which support it. But this tutorial can be a good start to get to know it. And this demo from mozilla can show you how that canvas.drawImage really does.