Firebug for Firefox 1.3.2 is an extension for Firefox that enables you to view the web code, CSS and other components that make up your web pages. Better still, you can edit the code within these pages and preview the pages live, before you commit the changes. The extension also enables you to test the load capacity of your site and pages to see how it will perform on a slow broadband connection.
Firebug for Firefox link.
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Saturn's rings only formed in the past 100 million years, suggests analysis of Cassini space probe data
New findings contradict conventional belief that Saturn's rings were formed along with the planet about 4.5 billion years ago