may have found solution for the problem I reported - Javascript Application error message
Recently, I reported a problem - many error messages in boxes labelled Javascript Application. The messages started with "Exc ev handl:" and tended to conclude with "TypeError: oSAPlg.oRoot.log is not a function" or "Bad NPObject as private data!"
I ran McAfee Virtual Technician. It reported one problem. I permitted it to try to fix the problem and linked the problem to Firefox. For the moment, I am not getting Javascript Application error messages.
Krejt Përgjigjet (1)
McAfee Site Advisor 3.4.0 just came out of the addons blocklist, and you have SiteAdvisor and even though that is the current version; nevertheless, you should uninstall it and reinstall it as noted in https://community.mcafee.com/message/203466 for a fresh version with only current files.
Also refer to http://kb.mozillazine.org/Problematic_extensions relating to McAfee Site Advisor 3.4.0 for more specific instructions.
Please mark "Solved" one answer that will best help others with a similar problem -- hope this was it.