actualy, not so good Rated 4 out of 5 stars
browser first show all content and only after that it is blocked by addon.
Ok. Seems the problem is partially fixed, but still flash objects are rendered before filtering. (Addon flashblock is installed)
From version 18.104.22.168, ProCon has a functionality where the web page will be rendered after the filtering, without affecting the browsing speed at all! Hope you'll enjoy it.