"Per Site" instead/in addition to 'Per Tab' Rated 3 out of 5 stars
From author FAQ: Que: Why doesn’t it block by site address?
Ans: This is more "powerful". Nevertheless, the site address feature will probably appear in a later version.
... IMHO it's not. This is why "permissions.sqlite" exists within 'every' profile and many addons are making use of it. Simply by manipulating permissions.sqlite, user will NEVER have to remember or set which site to allow/disable images like ImgLikeOpera does now everytime. So pleeease make use of either permissions.sqlite (preferred) or seperate database for "Per Site" settings for this good addon...