I've actually just been changing the script in notepad and then reinstalling it every time because I am dumb and do not know anything about javascript.
Assuming you use Chrome, to edit the localStorage, press F12, then click the "Resources" tab, then in the tree to the left, select Local Storage -> forum.blockland.us. Now you can edit it as a simple key/value store.
jQuery isn't used anywhere by SMF.
SMF uses Prototype.js. Or at least something with an identical API. PJS defines $ as a shortcut for document.getElementById. PJS $ is overridden by jQ $ because of the following snippet in the beginning of ignore-users.user.js:
function addJQuery(callback) {
// Creates script element.
var script = document.createElement("script");
// Inserts the Google CDN script as the source.
script.setAttribute("src", "http://ajax.googleapis.com/ajax/libs/jquery/1/jquery.min.js");
// Calls the callback function upon load.
script.addEventListener('load', function() {
var script = document.createElement("script");
script.textContent = "(" + callback.toString() + ")();";
document.body.appendChild(script);
}, false);
// Adds the element.
document.body.appendChild(script);
}
