Current Firefox also has keyword search for installed search engines-- this gives a UI similar to Chrome (where the keyword gets replaced by the search engine

Current Firefox also has keyword search for installed search engines-- this gives a UI similar to Chrome (where the keyword gets replaced by the search engine name after you hit space) as well as search suggestions for search engines that support it. You can change the keywords in Firefox preferences, under Search Shortcuts on the Search tab. What's a little unclear about this feature is how you add new search engines to this list-- since there's more functionality here than old-style bookmark keywords, it's not just a matter of right-clicking in a search field or pasting in a URL with a placeholder in it. On supported sites, click the location bar-- at the bottom of the dropdown, you'll see a "This time, search with:" entry with icons for each of your installed search engines, and, if the site supports search, an additional icon with a green "+". Click that to add the search engine, then set your keyword of choice in Preferences.