Rated 5 out of 5 stars
Very useful add-on. I used it to hide menu entries that I did not use at all, and my menus are now cleaner!
I hid the tools -> web developer entry and the whole bookmarks menu, because I already have it in the personal bar.
I like very much this add-on as well as personas because it gives a fresh look for my favorite browser.
Note: I am on a Mac computer.