I have old, outdated USER-IDs that appear in the pull-downs of Login boxes of a number of websites, with some sort of autofill. I would like to eliminate the old entries. For example, when I login to my bank's web site, I'm prompted to fill in my User-Id. I type the first letter of my User-Id (in this case, an "F") and I get a pull down from the box that gives me several old choices that also begin with "F." The bank IT person tells I need to dump the old choices in Firefox, but I can't figure out how to do it. I've searched thru Firefox Help, but I don't find anything.