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  Ghostery (for Firefox) 14 Feb 15

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  SimilarWeb for Firefox 23 Jan 15

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  MIME Edit 21 Sep 15

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  Littlefox 21 Jan 15

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  Twitter App 22 Jan 15

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  WOT (Web of Trust) for Firefox 20 Sep 15

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  Highlighted Text To File 11 Apr 15

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  Ecosia 31 Dec 14