Woks for me again Rated 4 out of 5 stars

FIXED- Unzip contents of xpi file to folder named {792BDDFE-2E7C-42ed-B18D-18154D2761BD} paste folder in 'extensions' folder in profile folder (C:\Documents and Settings\User name\Application Data\Mozilla\Firefox\Profiles\profilename\extensions) delete xpi file with same name ie. {792BDDFE-2E7C-42ed-B18D-18154D2761BD} from this folder. This works for me. Source: http://support.mozilla.org/en-US/questions/796359#answer-326560

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