Pick from: [I] The menu button is the person-shaped icon that appears on the upper-left corner of the menu bar. Click on " add creator " in the ribbon menu.; [II] It looks like a magnifying glass and can be found at the bottom of the browser window. Click " system preferences " located in the drop-down menu.; [III] The menu button is located in the upper left corner of your mozilla firefox window. Clicking it will bring up a drop-down menu with all of the applications you have installed and whom you wish to remove.; [IV] The menu button is on the upper-right corner of the screen. For older versions of firefox, click on tools on the menu toolbar on the upper part of the window.;Choose from options above and answer: What most naturally follows?

How to change the default font in firefox
Open mozilla firefox.
Double-click the shortcut icon on your desktop to launch the browser.
Click on the " menu " button.
Answer:
[IV]