Works, but... Rated 3 out of 5 stars
Simply clicking the star in Firefox (v. 22) now adds the page to Unsorted Bookmarks already (http://mzl.la/LHrvqn#w_how-do-i-create-a-bookmark), so this add-on seems kind of redundant.
It does add potentially useful features, though -- bookmarking the link on right-click, allowing multiple sites to be bookmarked quickly (via Multiple Tab Handler), and quicker bookmarking in older versions of Firefox.
Its usefulness aside, otherwise flawless.