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  ScrapBook for Firefox 11 Apr 15

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  WOT (Web of Trust) for Firefox 20 Sep 15

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  FlashGot 1 Jan 15

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  Session Manager 1 Jan 15

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  DuckDuckGo Plus for Firefox 21 Jan 15

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  Tamper Data 9 Jul 15

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  Optimal Access 7 Apr 16

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  Modify Headers 5 May 15