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YSlow analyzes web pages and suggests ways to improve their performance based on a set of rules for high performance web pages.

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Seeing an error in jsconsole for Yslow 3.1.8 on Firefox: _TypeError: Firebug.InfoTip.populateImageInfoTip is not a function_ It looks like the populateImageInfoTip function no longer exists in firebug. The relevant code...

Hi, I have downloaded YSLOW 3.1.8 Firefox extension and installed on a Windows OS. Its not still not working. Please share some details related to resolving this problem. DM

Added dom ready time as "rt", make page load time more accurate.

Added output of the parent content node and the style/script body to the listing of the inline style and script tags that can be minified. This will help to track...

When going to print the results of yslow I just get a blank page with just the URL of the site that I'm testing. But none of the info from...

Can the Media output list be saved to an ascii file?

Firefox 21.0, Firebug 1.11.4 --> YSlow 3.1.7 suddenly stop working on August /26/2013. I tried to installed the latest YSlow 3.1.8 but to no avail. All tabs (Home, Grade, Components,...

Hi, when first requesting a compressed page (i.e. uncached + "Content-Encoding gzip") compression is detected fine. Upon reloading the page (i.e. from cache, for it was meant to be cached)...