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  Simple RSS Reader (SRR) 10 Jul 15

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  Zotero 26 Jan 15

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  iMacros for Firefox 23 Jan 15

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  WiseStamp Email Signatures 1 Jan 15

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  WOT (Web of Trust) for Firefox 20 Sep 15

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  Firebug 1 Jan 15

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  CoolPreviews for Firefox 11 Apr 15

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  Google Advanced Operations Toolbar 21 Sep 15