This extension is a mirror of the original. It looks and it's supposed to work the same. But it doesn't work at all. It sort of does work if you downgrade to FF 56 and install nosquint plus v50. But that is not an optimal solution. And even then, it had deal-breaker bugs like not remembering per site settings. I don't blame the developer or the original developer for that matter. FF has sacrificed plug in/add-on functionality over security. And the new WebExtensions add-ons just don't cut it. We're all safer now. Just need reading glasses I suppose...