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December 16, 2007, 9:19 pm
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free, open-source add-in for Firebug that allows you to analyze your
web pages based on Yahoo's "rules for high performance web sites". The
add-on gives performance stats and recommendation on how to fix the
I put together a video of how YSlow works - if you want to check it
out before installing. It is available @
Disclaimer: I am in NO way associated with Yahoo, Yahoo Developer
Network, YSlow or Firefox.