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  Twitter App 22 Jan 15

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  WOT (Web of Trust) for Firefox 20 Sep 15

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  Google Advanced Operations Toolbar 21 Sep 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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  YouTube Control Center 30 Dec 14

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  Tamper Data 9 Jul 15

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  Mozilla Archive Format 22 Jan 15