Mozilla Firefox Beta 12 by default now shows link destinations at the bottom of window in a tooltip much similar to of Google Chrome instead on the location bar, yep Mozilla bowed to users for criticism against removing the status bar for the sake UI changes.

Firefox 4's link target display at the bottom in a tooltip

We’ve covered that Status-4-Evar extension adds status bar functionality/features to Firefox 4 and another add-on Link Target Display shows link targets in a tooltip at the bottom.

It’s confirmed that at least  link destinations will appear at the bottom, if you want more status bar features like page loading actions in Firefox 4 go for Status-4-Evar extension.