re: 6 -- there were very few performance tweaks in FF6. Mostly CSS3 and HTML5 additions. FF7 is the 'performance' build (Azure, first round of start-up, smaller

re: 6 -- there were very few performance tweaks in FF6. Mostly CSS3 and HTML5 additions. FF7 is the 'performance' build (Azure, first round of start-up, smaller memory footprint). FF8 seems to have some performance bits -- and presumably it will have some feature additions, too (but I need to investigate).