One click custom search in address bar does not submit search query
https://support.mozilla.org/en-US/kb/search-firefox-address-bar says that "You can choose an alternative search type and use it for your search with one click if you don't want to use the current default."
However, that doesn't happen.
Steps to Reproduce: 1. Launch Firefox (Windows or Ubuntu) 2. Type "sennheiser" in the address bar 3. Click a custom search provider's icon (e.g. Wikipedia)
Expected Result: A list of search results on Wikipedia or the Sennheiser Wikipedia page.
Actual Result: UI elements change in the address bar (see screenshots)