Hi Bathsheba,

The annoying "Block *.com" footnote could be remove in the preference page, you are not the only one who don't like this. ;P

Also, you are not the only one who want the image block feature, here is the ticket:
https://github.com/wildskyf/personal-blocklist/issues/15

I will make some big change for this add-on recently, hope you are willing to wait for it. :)