I am trying to get rid of ask.com -- it comes up as a default page when a URL is not found, to tell me the URL is not found. Plenty of advice all over the Internet suggests editing about:config in a standard install of Firefox and changing the keyword.url value.
Well, I've tried pasting in http://www.google.com/search?q= and I've tried "Reset" on keyword.url, but neither one sticks. Whether or not I restart the browser, as soon as I type in an invalid URL, that cursed ask.com shows up again.
I can find no information on what to do if the keyword.url change doesn't persist. Where is that value coming from, and what can I do to change it permanently?
(Firefox 3.6.3 portable, Win 7 Home Premium 64)