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  Wappalyzer 15 Apr 15

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  Enigmail 25 Jan 15

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  Ghostery (for Firefox) 14 Feb 15

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  Hola Unblocker for Firefox 1 Jan 15

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  Fast Dial 1 Jan 15

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  Mozilla Lightning 25 Jan 15

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  CoolPreviews for Firefox 11 Apr 15

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  About:addons-memory for Firefox 25 Jan 15