Daniel Jalkut of Red Sweater Software:
The motivation behind my foray into Safari extension development was my early adoption of Safari 6 during the beta phase. I noticed they had removed the long-standing, built-in “RSS” button near the URL bar. This button makes it easy to subscribe to an RSS or Atom feed for a blog, or any other site that offers such a feed.
Red Sweater makes the fabulous MarsEdit which I have used to post pretty much every blog post I have ever written for this site. I don’t add feeds to RSS all that frequently these days, but when I do I like the one click functionality. If you miss this from Safari 6, here is the answer.