User Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Firefox/60.0 Steps to reproduce: 1. Give focus to search bar. 2. Press CTRL+DOWN to change default search engine. Actual results: One-click search button for newly default search engine stays, and old default search engine is no more searchable. We are obliged to give focus to another browser element (for example address bar) then giving focus again to search bar to see one-click button appeared. Expected results: Old default search engine should immediately be available through a one-click search button. May be fixed fixing bug 1469787.