Quick feedback. On desktop, Firefox 62 / Chrome 69, Windows 10.
I immediately went to put in eg MSFT in the search box in the upper left. When I hit enter it just blanks the input box. The search icon is non-reactive to clicking. The only way the search box fires properly is if I click on the auto-suggest that drops below the input box. You should definitely wire up the icon to trigger the search, and enter needs to work as well.