https://addons.mozilla.org/en-US/firefox/addon/433

Never be annoyed by a Flash animation again! Blocks Flash so it won't get in your way, but if you want to see it, just click on...

https://addons.mozilla.org/en-US/firefox/addon/1843

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...

https://addons.mozilla.org/en-US/firefox/addon/748

Allows you to customize the way a webpage displays using small bits of JavaScript. ...


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