Method setJavaScriptDisabled

additions/juggler/content/FrameTree.js:135–139

(javaScriptDisabled)

  _ensureWorld(worldName) {
    worldName = worldName || '';
    let world = this._isolatedWorlds.get(worldName);
    if (!world) {
      world = new IsolatedWorld(worldName);
      this._isolatedWorlds.set(worldName, world);
    }
    return world;
  }