Firebug (Firefox extension)

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Firebug 1.05 running in Firefox 2, showing HTML code on the main Wikipedia page.
Firebug 1.05 running in Firefox 2, showing HTML code on the main Wikipedia page.

The Firebug extension for Mozilla Firefox allows the debugging, editing, and monitoring of any website's CSS, HTML, DOM, and JavaScript, and provides other web development tools. Firebug's official website has a complete guide to what it can do.

Firebug was written by Joe Hewitt, one of the original Firefox creators.

The Firebug plugin YSlow is a web development tool and analyzes web pages and tells you why they're slow based on the rules for high performance web sites. It offers

  • Performance report card
  • HTTP/HTML summary
  • List of components in the page
  • Tools including JSLint


[edit] External links