OP #1: https://community.norton.com/en/forums/norton-security-av-just-began-ran...
See the follow IMG re File Insight from Norton Security 22.214.171.124:
Currently, I do not have trouble running Mozilla Firefox at the time of updating this post.
I don't use the latest v22.7.x but I wouldn't be surprised if some of these false positives are associated with the new sandbox feature. From the Norton Beta Center for the v22.7.x beta testing that just concluded:
"Sandboxing, or isolating potential threats
...Norton is extremely proud to announce a new high-performance emulator that uses these cybercriminals' tricks against them. Norton Security will run and analyze unknown and suspicious files in an isolated protected virtual environment to see how they act before allowing the file to be run on the user's device. This helps to ensure the file is safe before it takes up residence and wreaks havoc on a user's device."
This new emulator is also mentioned in the support article My Norton product looks different.
32-bit Vista Home Premium SP2 * Firefox v47.0 * NIS v126.96.36.199 * MBAM Premium v2.2.1
Someone shared his insight w/ me that, the trouble could be caused by the possibly problematic component(s) and/or (virus) definition (set).
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