JS *is* a big deal, at least for me. I turn javascript off unless I need it because it causes annoying lag issues, especially on badly coded pages (not to mention its used way too much for doing silly little performce-eating things). For me on linux using firefox, I find gmail lags all to hell, it takes 1-2s to tab switch away from it. I switch to HTML mode sometimes because it gets on my nerves. This is on a core2duo 2.4ghz with 2GB of RAM. JS can really get out of hand, I'm looking forward to FF 3.1 with tracemonkey.