I have installed the latest versions of YSlow and Firebug into the latest version of Firefox on Windows 7 (and restarted Firefox), but when I click on YSlow nothing happens. Also, when I click on Firebug, it opens but has no YSlow tab. I have disabled all other Firefox plugins and played with right-clicking YSlow and clicking run once and auto-run.
What am I doing wrong?
YSlow works by crawling your website and comparing it against a list of 23 rules, based on Yahoo's rules for high-performance websites. YSlow then scores your site against these 23 rules and gives you an overall score based on the average. Each of the 23 rules has a different weighting.
Visit http://yslow.org to install the YSlow extension on your web browser. On Google Chrome, YSlow runs independently. On Mozilla Firefox, however, you must also install the Firebug add-on to use YSlow. When you first start the YSlow plugin, the Home tab is selected.
As a temporary solution, try using the YSlow bookmarklet.
It's an equivalent of regular YSlow.
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