Can I change the Firefox menu to look like the Firefox menu in Windows?

Right Click to the right of the menu and untick Menu Bar.

Now it will have a win7 type menu.

To activate the new Firefox 4 layout with the "Firefox" button replacing the menu bar, uncheck View ---> Toolbars ---> Menubar.

But in Linux you will get just a plain grey button instead a orange one like in Windows. But there are several fixes:

• http://userstyles.org/styles/43590/firefox-4-menu-button-v2-linux (requires Stylish Addon)
• http://userstyles.org/styles/43513/firefox-4-menu-windows-look-alike-linux (requires Stylish Addon)
• https://addons.mozilla.org/de/firefox/addon/themed-button-for-linux/ (Stand-alone Addon)

You can go further than just unchecking the Menu Bar (though this is the first step). Simply install the Movable Firefox Button extension and you get a nicer button that you can move all over the place.

I stick mine on the right of the tabs because I only use it very rarely