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  Active Whois Plugin for Firefox 7 Apr 16

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  MIME Edit 21 Sep 15

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  AnonymoX 5 Nov 14

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  HTTPS Everywhere for Firefox 11 May 16

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  FastestFox 21 Jan 15

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

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  Wappalyzer 15 Apr 15

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  WiseStamp Email Signatures 1 Jan 15