Just refreshed Firefox browser, which among other things removes all extensions.
Attempting to reinstall from Norton 360, internet security, browser extensions, it launches the browser and gets "internal server error".
I have gone instead to the Firefox add-on extension and at least installed the main extension I remember "Norton safe Web"
I didn't originally, but have now installed the latest Norton 360 version 188.8.131.52, getting same results. I didn't need to install them, but have tried for the other internet browsers I have installed, Chrome and Edge, and they get same message.
Is this a known problem? Temporary server problem? other?