Adjust Firefox top visit suggestion in address bar

Firefox 43.0.1 introduced a new "visit: suggestion at the top of the list of sites returned in searches entered into the address bar. 
 To disable this (standard behavior prior to 43.0.1): 
 
 Go to about:config 	 Change browser.urlbar.unifiedcomplete to false 
 
 To enable this (standard behavior in 43.0.1): 
 
 Go to about:config 	 Change browser.urlbar.unifiedcomplete to true 
 
 Disabled (default prior to 43.0.1): 
 Enabled (default as of 43.0.1): 
 Source: https://www.reddit.com/r/firefox/comments/3×98fa/is_there_a_way_of_turning_off_the_top_visit/