I can't believe I missed this Link Toolbar extension all this time. It adds a small site navigation widget in your statusbar that allows you to make use of any <link>s that a webpage may have. Opera has it, so does Mozilla. But this extension probably places it in the best and most logical section of the browser screen - in the statusbar. It doesn't reduce your viewport like the one for Opera does (it appears as a toolbar). I've been wanting something like this ever since I used it on Mozilla.
Here's a screenshot:
And another with the More widget in action, displaying the alternate RSS format for a website: