superstar-flash-disabler.user.js

// ==UserScript==
// @name         Superstar Flash Disabler
// @namespace    superstar-flash-disabler
// @version      0.1
// @description  Disable Falsh Player on Superstar online course system by not using danmaku
// @author       Grover Chou
// @match        https://*.chaoxing.com/mycourse/studentstudy*
// @grant        none
// ==/UserScript==

(function() {
    'use strict';

    var frameElement = null;

    var frameElementCatcher = setInterval(function(){
        try {
            frameElement = window.frames[0].frames[0].frameElement
        } catch (error) {
            // console.error(error);
        }
    }, 100);

    var newDataSetter = setInterval(function(){
        if (frameElement != null) {
            clearInterval(frameElementCatcher);
            var newData = frameElement.getAttribute("data").replace(/"danmaku":1/, "\"danmaku\":0");
            frameElement.setAttribute("data", newData);
            clearInterval(newDataSetter);
        }
    }, 100);
})();