Good, But Blocks Sites Forever — It Takes A Trick To Unblock! Bewertet mit 5 von 5 Sternen

I totally blocked one site to be unavailable all the time. It seemed impossible to unblock it!
To unblock it, create another rule with the same string in it, but different conditions allowing for the site to be shown. It will override the old settings.
Not very convenient anyway, so I'll use another extension like "SiteBlock" or "Simple Site Blocker 1.1".