User Agent: Mozilla/5.0 (X11; Linux i686; rv:26.0) Gecko/20100101 Firefox/26.0 Iceweasel/26.0a2 (Beta/Release) Build ID: 20130928004001 Steps to reproduce: In the navigation bar typed "abo". Actual results: Got hinted for some http URL with "abo" in it, despite me having typed about:config so many times in the past that it should remember it by now. Expected results: Should have been hinted with about:config.
This is intentional. You can bookmark the page if you want it in your autocomplete.
What a surprise. OK.