Useful Firefox add-ons

Firebug integrates with Firefox to put a wealth of development tools at your fingertips while you browse. You can edit, debug, and monitor CSS, HTML, and JavaScript live in any web page.

Provides detailed information about the data being collected trough Query String and Cookies by web analytics solutions (called “tags”, “trackers” or “web bug”), ad networks, behavioral targeting and multivariate testing tools. Covers over 125 tools, including Google Analytics, Omniture SiteCatalyst, Coremetrics, WebTrends and several others.

HTML Validator
Validates HTML documents using the CSE HTML Validator engine for Windows. Requires CSE HTML Validator for Windows.

It will capture what you can see in the window, the entire page, just a selection, a particular frame… basically it saves web pages as images – either to a file, or to the clipboard.

Draw out a ruler to get the pixel width and height of any elements on a webpage.



  • 17/09/2009: Added MeasureIt.

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