Yahoo Releases YSlow for Firebug

Yahoo! Developer Network recently released YSlow, and extension for Firebug, the great web development extension for Firefox we talked about last month (here).


YSlow analyzes web pages and tells you why they’re slow based on the rules for high performance web sites. YSlow is a Firefox add-on integrated with the popular Firebug web development tool.

YSlow offers three views or panes in Firebug.

  • Performance View: Gives your page a grade for a number of performance checks.

  • Stats View: Shows you the total size of the web page for bothed cached and non-cached content.

  • Components View: Displays all of the components on the page including type, url, expiry date, and a number of other goodies.

YSlow is a very cool addition to Firebug. If you are a web developer it should definitely be in your toolkit.