[Affected versions]: Nightly 51 Build ID 20160824030337 [Affected platforms]: Ubuntu 15.04 x64, Windows 10 x64 [Steps to reproduce]: 1. Open Firefox with a new profile. 2. Type something in the Awesomebar. 3. Click the settings gear. 4. On One-click search engines section remove blue checks for each search engine. 5. In a new tab enter a search term in the Awesomebar. [Expected result]: The matching results (bookmarks, open tabs, history) should be displayed in a dropdown list. The one-off bar should be displayed at the bottom of the awesome bar dropdown and should not contain one-offs searching engines. The settings gear should be displayed in the right side of the one-off search bar. [Actual result]: The matching results (bookmarks, open tabs, history) are displayed in a dropdown list. The one-off bar is not displayed at the bottom of the awesome bar dropdown. The settings gear is not displayed at the bottom of the awesome bar dropdown.

This is the expected behavior, disabling all engines should hide the one-off bars (both in searchbar and locationbar)