I noticed you have two different keyword search extensions, so before describing the built-in settings, it probably would be best to understand: * What search engine do you want to use in the address bar? ** Do you need special features of that search engine? * Or do you want Firefox to never search from the address bar? ---- By the way, the Keyword Search extension's settings are available on the Add-ons page. Either: * Command+Shift+a * "3-bar" menu button (or Tools menu) > Add-ons In the left column, click Extensions. Then on the right side, find Keyword Search and click its Options button. I am not familiar with the other one.