2. Make changes to the code the script use "/" instead of using ","
3. To do this, use NVU to create a HTML that contains link to the modified JavaScript on your desk top. The link should read as file:///C:/myPath/myJS.js
4. Load the HTML file to Firefox.
5. Uninstall the previous script and install the new script now.
6. Try whether the new access keys take effects.