Thanks for letting me try this out! :)
It works, but I did notice something. Where are "settings for current site" stored at? I could see where some people might want to delete those for privacy purposes, especially some of my friends in China. Also, I figure over time that could get huge if it's saving for each and every site you go to (whether you make custom settings or not? I'm not clear on this...) and some might want to clear it out to speed up things down the road?
And one last thing, I understand regex and was able to also blacklist subdomains (etc.) like this:
^https?([^.]+)\.example\.com
But I think the average user would struggle with this so you might want to include examples of that as well since it's a fairly common thing people may run into? Or better yet, have an option to do that with a checkbox?
Thanks again! -Cow