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  ScrapBook for Firefox 11 Apr 15

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  Lightbeam 1 Jan 15

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  SearchPreview 1 Jan 15

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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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  FireShot for Firefox: Capture + Annotate Webpage Screenshots 26 Jan 15

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  HTTPS Everywhere for Firefox 11 May 16

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  Awesome Screenshot for Firefox 11 Apr 15