I have all kinds of grand visions for what I'd like to do [to fixup Mozilla XUL]. I've posted many of them or hints about them over the last year or so. Remote XUL, improved templates, a canvas tag, and so forth. In some cases, I started an implementation only to be blocked by some non-implementation related issue. I actually started implementing something so that chrome URLs could be mapped onto http URLs but I stopped after it seemed unlikely that it would ever make it into Mozilla. I started working on some features for XUL templates, but Axel said that "creating template enhancements [is probably not] the right thing to do at the moment", so I didn't continue. I did get to the point where I posted a patch about the canvas tag, but then other developers seemed to take over and the patch disappeared into the Pit of Forgotten Patches. When Alex Vincent created a serverpost tag, no one seemed to want to accept it so it never got any where.

- Neil Deakin

Source: Neil's Place