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  WOT (Web of Trust) for Firefox 20 Sep 15

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  ScrapBook for Firefox 11 Apr 15

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  Wappalyzer 15 Apr 15

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  DownThemAll 1 Jan 15

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  HTML Validator (based on CSE HTML Validator) 21 Sep 15

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  Click&Clean for Firefox 1 Jan 15

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  Sourceforge Direct Download 21 Sep 15

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  Greasemonkey 1 Jan 15