There was a firefox optimized for yahoo update that I did and since it seems I get a lot of yahoo page 404 not found and the autofill feature does not work, it is still checked to be used
A lot of the time when I first open up firefox I try to navigate to a page and I get page not found error, but it redirects to yahoo 404 error. This mostly happens when I first open firefox, sometimes even later in my browsing session. I will have to try to click the web site that I want 2-7 times before it will finally not navigate to the yahoo page 404 error code. It also seems that autofill is not working, although the selection is enabled.