Well, sort of. I appreciate the work the developers have done, but the extension is utterly useless (IMO, anyway). As a warning to others, I was experiencing severe performance issues when I had AdBlock installed/enabled. Safari would hang from 5-30 seconds, sometimes crashing entirely. It took me a painstakingly long time to identify the culprit (AdBlock). Not only did I experience performance issues, but it did not block all advertisements - at least not the ones that AdBlock for Firefox does. For instance, when I viewed certain embedded videos, I would have to watch a one minute ad first. This did not occur when I viewed the same page/video in Firefox (with AdBlock installed). I'm curious to know why Apple approved this extension even though it doesn't appear to work all that well. Aside from failing to block all advertisements, it undermines the stability of Safari. If that's not a reason to reject an extension, I'm not sure what is. If you're interested, here is a website that causes Safari to hang, without fail, when AdBlock is installed/enabled (www.mmajunkie.com). If I'm the only one experiencing this issue, then my sincere apologies to the AdBlock developers!