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  FEBE 16 Apr 15

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  IE Tab for Firefox 1 Jan 15

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  Lightbeam 1 Jan 15

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  Adblock Plus for Mozilla Firefox 4 Mar 16

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  HTTPS Everywhere for Firefox 11 May 16

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  Hola Unblocker for Firefox 1 Jan 15

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  Simple Adblock 16 Apr 15

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  Zotero 26 Jan 15