A problem Rated 5 out of 5 stars

After install this add-on, the add-on bar will always show when I restart Firefox. I need to close the bar by myself every time.

-- Thanks for the reply. So are there any workaround to it? Closing the bar everytime is really annoying. I think the function in context menu is alrealy enough for me.

-- OK, I think "minimize add-on bar" can temporary solve this problem for me now. But this should be fixed by Mozilla.

This is how Firefox 4 works. Whenever an addon is added to the addon bar, the addon bar will stay open.
Perhaps you should suggest to Mozilla to keep the addon bar closed if the user closes it.