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  Ghostery (for Firefox) 14 Feb 15

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  Simple Adblock 16 Apr 15

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  Active Whois Plugin for Firefox 7 Apr 16

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  Fast Dial 1 Jan 15

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  X-notifier 1 Jan 15

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  Littlefox 21 Jan 15

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  HTML Validator (based on CSE HTML Validator) 21 Sep 15

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  HTTPS Everywhere for Firefox 11 May 16