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  Grammarly Lite for Firefox 22 Jan 15

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  Google Advanced Operations Toolbar 21 Sep 15

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  DownThemAll 1 Jan 15

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

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  FoxyProxy Basic 22 Jan 15

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  Adblock Plus for Mozilla Firefox 4 Mar 16

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  Annotary 21 Jan 15

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  Game-Station toolbar 13 Jul 15