LaunchAgent to run privacy.sh when Safari quits.

com.user.clearsafari.plist

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple/DTD PLIST 1.0/EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
    <dict>
        <key>Label</key>
        <string>com.user.clearsafari</string>
        <key>ProgramArguments</key>
        <array>
            <string>/bin/bash</string>
            <string>/Users/USER/scripts/privacy.sh</string>
        </array>
        <key>WatchPaths</key>
        <array>
            <string>/Users/USER/Library/Preferences/com.apple.Safari.plist</string>
        </array>
    </dict>
</plist>