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  WebMail Ad Blocker for Firefox 15 Apr 15

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  WOT (Web of Trust) for Firefox 20 Sep 15

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  PDF Download 6 Feb 16

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  Ghostery (for Firefox) 14 Feb 15

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  YouTube Control Center 30 Dec 14

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  CoolPreviews for Firefox 11 Apr 15

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  Twitter App 22 Jan 15

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  Wappalyzer 15 Apr 15