Yeah it looked that way. I do the same thing but usually I choose colors that clash hideously on purpose so that I can clearly see where and how the divs, containers and other elements line up.
Yeah, that's using the canvas 2d rendering context. Firefox might be slower at loading/rendering pages, but they seem to be better at rendering real-time graphics.Really? Firefox has been getting extremely bloated and slow as of late. They have plans to completely redesign their framework but that's not happening any time soon.