InformAction Forums

I'd like to know what permissions like object ping fetch ping noscript unrestricted css and others do.
I mean, what exactly do these options block?

This is being described here: What do the individual checkboxes for Default/Trusted/Untrusted/Custom mean?

That list is pretty technical as everything here. It would be nice to know what the options mean in practice. For example the factory settings of the Default-mode allow "frame","fetch" and "other" at least when I checked this last time. Are these considered safe or does allowing bear any risks? And what about those other options?