In firefox 60 if you disable scriptsafe to allow scripts globally then go back any number of pages its entry will often disappear from the context menu when attempting to re-enable it. The only way to get it back is to either reboot the browser or go into about:addons and disable then re-enable the addon.
In firefox 60 if you disable scriptsafe to allow scripts globally then go back any number of pages its entry will often disappear from the context menu when attempting to re-enable it. The only way to get it back is to either reboot the browser or go into about:addons and disable then re-enable the addon.