Mozilla Firefox 4 brought a lot of UI changes on Windows 7, one of them being the menu bar being replaced with a Firefox menu button on the top left side. Though it provides access to the functions used mostly, many don’t like the look of the button and the space it occupies on the tab bar.
The add-on Firefox UI Fixer fixes that annoyance in Firefox 4 by allowing you to move the Firefox app menu button anywhere in the Firefox UI like onto the Navigation toolbar.
After installing, go to Add-ons and open the Options dialog for this extension. Choose the ‘Make Firefox Menu button movable’ option and then move the button using ‘Customize Toolbar’ dialog.
Place it on the extreme right of the navigation bar to have a setup similar to Google Chrome.