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  Twitter App 22 Jan 15

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  Awesome Screenshot for Firefox 11 Apr 15

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  Default FullZoom Level for Firefox 11 Apr 15

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  CLEO 6 May 15

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  WOT (Web of Trust) for Firefox 20 Sep 15

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  Tab Mix Plus 23 Jan 15

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  FEBE 16 Apr 15

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