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How can I turn back on McAfee SiteAdvisor because I rely on it CONSTANTLY?

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I use McAfee SiteAdvisor to help keep myself safe while browsing the web, and when I get on this morning, all of a sudden Mozilla says that it was disabled. McAfee and its SiteAdvisor is a recognized SECURITY company. Let me put it back.

I use McAfee SiteAdvisor to help keep myself safe while browsing the web, and when I get on this morning, all of a sudden Mozilla says that it was disabled. McAfee and its SiteAdvisor is a recognized SECURITY company. Let me put it back.

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hi, please install the latest available (& signed) version of the addon - it is called web advisor by now as well...

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I just tried that from their McAfee WebAdivsor site, and McAfee says that I have a newer version already installed on my computer. I am using McAfee total protection, so I already have the latest available version.