As you may know, Firefox 57 comes with a new user interface, known as "Photon". It is intended to provide a more modern, sleek feel that’s consistent across multiple platforms. It replaced the previous "Australis" UI and features new menus, a new customization pane and tabs without rounded corners. In Firefox 57, the Search box is not present by default on the toolbar. The address bar is intended to replace it. If you find this change inconvenient, you might want to add the search box back to the address bar.
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