Posted Nov 9, 2011 13:11 UTC (Wed) by Cato (subscriber, #7643)
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Firefox is just scanning for installed addons when it starts up, I believe, so the addon would have to change Firefox's own files to fool it - probably possible but addons that do that are really crossing the line into malware and should be treated as such.
Firefox 8 released
Posted Nov 9, 2011 20:43 UTC (Wed) by gidoca (subscriber, #62438)
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IMHO, changing the home page and default search provider at every start of Firefox is already well beyond the line to malware.