Grant "access local files" permission to NoScript (Firefox 153 and above)

2034168 introduced a new restrictions on all webextensions, preventing them from accessing / injecting local documents loaded via file:// URIs. A corresponding new permission called Access Local Files on Your Computer must be explicitly granted by users in the extension management UI in Firefox 153 and above.

NoScript needs this permission to make Safer and Safest security levels work as expected on file:// URIs.

Therefore it should be granted automatically and prevented from being accidentally removed, similarly to other NoScript-specific extension settings.