Comment 5 for bug 885592

Clicking breadcrumbs is a poor workaround for such an often used activity. First, most of time the parent breadcrumb is hidden, so you first need to click the reveal button before the parent button even shows up. This essentially doubles the number of clicks to navigate to the parent. Furthermore, the parent breadcrumb moves around, and isn't always in the same location. This also slows down up-navigation. Lack of a true parent-button is a huge step backwards in productivity.