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I geta repeated error messages from Jav:a Exc in ev handl: TypeError: oSAPlg.oRoot.log is not a function

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After a recent upgrade of JAVA and/or Firefox, I'm not sure I get a repeated (every 5 - 10 seconds) error message: " Exc in ev handl: TypeError: oSAPlg.oRoot.log is not a function"

Renders Firefox unusable.

After a recent upgrade of JAVA and/or Firefox, I'm not sure I get a repeated (every 5 - 10 seconds) error message: " Exc in ev handl: TypeError: oSAPlg.oRoot.log is not a function" Renders Firefox unusable.

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Most probable reason is that McAfee Site Advisor 3.4.0 just came out of the addons blocklist.

Best solution appears to be to uninstall Site Advisor from system and then to reinstall again from www.siteadvisor.com as noted in https://community.mcafee.com/message/203466

Also refer to http://kb.mozillazine.org/Problematic_extensions relating to McAfee Site Advisor 3.4.0 for more specific instructions.