Examine source code of PlaylistaNet

{
  "name": "playlista",
  "description": "Plugin usprawniający działanie serwisu playlista.net",
  "version": "1.2.2resigned1",
  "manifest_version": 2,
  "browser_action": {
    "default_icon": "icon.png",
    "default_popup": "/popup.html"
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "/jquery-3.3.1.min.js",
        "/script.js",
        "vods.js"
      ],
      "all_frames": true
    }
  ],
  "permissions": [
    "<all_urls>",
    "storage",
    "tabs",
    "webRequest",
    "webRequestBlocking",
    "background",
    "activeTab"
  ],
  "background": {
    "scripts": [
      "/script.js"
    ],
    "persistent": true
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{a9e1933e-c338-4fb9-ac85-b381af768f4c}"
    }
  }
}