Be able to set filters that only would be enabled for a specific web site or program and be able to exclude a web site or program from a filter’s influence.

You could create complex filters that would not interfere the whole surf experience.
For example, I want to remove some web content from my web email account because my emails are displayed at the bottom of the web page and I have to scroll down once and again to display them. The content that I removed to be able to display my emails at once is not displayed on the rest of the web pages.