This is still possible in Firefox 77 if I am understanding correctly. The magic entries in about:config are keyword.enabled - Turning this off will make firef

This is still possible in Firefox 77 if I am understanding correctly. The magic entries in about:config are keyword.enabled - Turning this off will make firefox never search for something you type in the address bar. browser.fixup.alternate.enabled - Turning this off will make firefox never try to "fix" the url you type in by putting .com on the end of it.