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Be sure you trust any scripts you install
Web.de AutoLogin
Automatically submits the web.de login form (and checks the "Keep me signed in" box) if your username and password were automatically filled in (typically by the Firefox password manager). This script only logs in when necessary; direct your bookmark to http://my.ebay.com/ and the script should take care of the rest, as long as Firefox is set to remember (and autofill) your log-in details.
You could comment on this script if you were logged in.
