{
    "*://*.worldcat.org/account/?page=login*": {
        "name": "WorldCat",
        "logout": {
            "cookies": ["JSESSIONID"]
        },
        "login": {
            "urls": [
                "https://www.worldcat.org/account/?page=login"
              	],
            "formURL": "https://www.worldcat.org/account/",
            "method": "POST",
            "usernameField": "username",
            "passwordField": "password",
             "hasHiddenInputs": true,
            "check": "span.useracct-wc-on"
        }
    }
}
{
    "*://*.worldcat.org/*": {
        "name": "WorldCat",
        "match": "https?://([^.]+\\.)?worldcat\\.org(?!/search*)(?!/title*)(?!/whatis*)",
        "logout": {
            "cookies": ["JSESSIONID"]
        },
        "login": {
            "urls": [
                "https://www.worldcat.org/",
                "http://www.worldcat.org/"
              	],
            "formURL": "https://www.worldcat.org/account/",
            "method": "POST",
            "usernameField": "username",
            "passwordField": "password",
            "hasHiddenInputs": true,
            "check": "span.useracct-wc-on"
        }
    }
}
Add site config for WorldCat
Add site config for WorldCat
