There have been significant advances to the underlying code, see this post here by Josh Aas, Gecko platform software engineer with Mozilla Corporation: http://

There have been significant advances to the underlying code, see this post here by Josh Aas, Gecko platform software engineer with Mozilla Corporation: http://boomswaggerboom.wordpress.com/2010/11/10/firefox-4-for-mac-os-x-under-the-hood/ http://boomswaggerboom.wordpress.com/2010/11/10/firefox-4-fo...