I share a computer, and we both have multiple Yahoo! accounts. This Greasemonkey script replaces the login form on any Yahoo page with a select box with your Yahoo ID’s pre-populated. The user has to edit the script to put their ID’s in there before it will work. (More of my userscripts.)
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How do I add my Yahoo Ids to the script? Sorry, I’m not very computer savy.
First you have to know how to edit a script you’ve already installed. You can do that from the “manage user scripts” command under firefox’s Tools menu. When you have the sript open in your text editor of choice, look for where it says
"Put","Your","User","ID","Here". Replace this with your id’s. For example, if your ID’s where jrhyley, jrhylee, and freakho, you would replace"Put","Your","User","ID","Here"with"jrhyley", "jrhylee", "freakho".