Want to personalize the content shown after you hit the new Firefox button in Firefox 4? With the Personal Menu add-on for Firefox, this is pretty easy to do. It allows you to strip or add features from the menu so that you can hopefully get a lot more use out of it.
Here is a little more about the add-on from the developer:
Now you can edit the Firefox Menu and change it to your personal and powerful one! Personal Menu provides you a couple of new helpful items that available to be put into Firefox Menu: Bookmark Items, History Items, Configuration(about:config), Restart. In addition, you may create toolbar-box (let you put toolbar-buttons inside), sub-menus and split-menus to organize your Firefox Menu!
To sum things up, if you are one of those people who thought, "Well, this menu item would be a lot better over here" or "Why is there no easy way to get to that feature" then this add-on was designed for you. This add-on gives you the most control (in comparison to other add-ons like it) when it comes to really customizing everything that is shown under the Firefox button.
You can pick up the Personal Menu add-on from the Firefox Add-ons website.