Yes, there's an Intel version. The link is below the system requirements on the MacUpdate page I linked.
If you primarily want an ad blocker, PithHelmet might be simpler. It's just for Safari. It can filter links based on the linked URL and block access to certain sites. I'm not sure if it works across the board, though. I mean, I know it can block pages and images and plugins, but I'm not sure it'll block ALL connections to the site, like those coming from JavaScripts using AJAX.