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  ZenMate VPN for Firefox 15 Aug 18

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  FVD Speed Dial with Full Online Sync 21 Jan 15

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  FastestFox 21 Jan 15

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  CLEO 6 May 15

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  Click&Clean for Firefox 1 Jan 15

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  SimilarWeb for Firefox 23 Jan 15

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  Littlefox 21 Jan 15

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  Ghostery (for Firefox) 14 Feb 15