As has been pointed out here many times (e.g. http://news.ycombinator.com/item?id=1132721 http://news.ycombinator.com/item?id=1132721), Firefox's performance pr

As has been pointed out here many times (e.g. http://news.ycombinator.com/item?id=1132721 http://news.ycombinator.com/item?id=1132721), Firefox's performance problems have to do with DOM and rendering, not JS execution. They continue to pour effort into optimizing the wrong thing, perhaps because that's where the benchmarks and bloggy coolness are. The old joke comes to mind about the drunk looking for his car keys under the street lamp, instead of where he dropped them, "because the light's better here"...