Need to access the Firefox 3 Library function without clicking on Bookmarks, then Organize Bookmarks?  You could always go with the keyboard combination Ctrl+Shift+B.  Want an easier one? Try typing this in your address bar:

chrome://browser/content/places/places.xul

This will open up your Firefox 3 Library inside of your main browsing window.  Now you can have a little more screen real estate to edit and manage your favorite links.  Bookmark it and get this "big view" at your fingertips anytime you need it with just the click of a bookmark.