Just installed Firefox 0.9. It rocks of course, as always, but here’s how to make it even faster: go to about:config and change the following values:

• config.trim_on_minimize=false (you’ll have to add this one yourself)
• network.http.pipelining=true
• network.http.pipelining.maxrequests=100
• network.http.proxy.pipelining=true
• nglayout.initialpaint.delay=0

Other cool option: browser.xul.error_pages.enable=true