Bloglines has hijacked my computer!

Attempting to preview an RSS feed in my browser (Mozilla/5.0 (Macintosh; U; PPC Mac OS X 10.5; en-US; rv:1.9.0.5) Gecko/2008120121 Firefox/3.0.5), I type the feed url, like http://www.jefflazerus.com/blog/feed, and the Bloglines “subscribe” page tries to take over. I understand how the convenience of this would be an advantage sometimes, but unless I explicitly tell Bloglines to get a feed, why would it? I don’t really want to add blogs to my Bloglines feed list manually (copying and pasting the feed URL into a form in my Bloglines preferences page), but I do want to hit the “Sub with Bloglines” button if Firefox, rather than the thing hijacking my browser.