@jackr - Glad you like it.
Regarding is_adult: Have you looked at the 'personal.ini' configuration? When you configure the plugin, at the bottom, there's a button to view the defaults for the many settings.
What you want is to add this to your personal.ini settings:
## Some sites also require the user to confirm they are adult for
## adult content. In commandline version, this should go in your
## personal.ini, not defaults.ini.
Looking at it, I see that it's actually not easy to pick that setting out of the defaults file--I'll make it clearer.
You can also set user/pass for different sites that require log in.