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  Omnibar 15 Apr 15

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  Awesome Screenshot for Firefox 11 Apr 15

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  DuckDuckGo Plus for Firefox 21 Jan 15

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  OutWit Docs 26 Jan 15

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  DownThemAll 1 Jan 15

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  FoxFilter 4 May 15

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  FoxLingo 15 Apr 15

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  WOT (Web of Trust) for Firefox 20 Sep 15