Examine source code of FilmBoosterFF

{
  "name": "FilmbBooster",
  "description": "Wtyczka pozwala oglądać wiele filmów i seriali bezpośrednio w serwisach Filmweb i Filmdb.",
  "version": "2.1.2resigned1",
  "manifest_version": 2,
  "browser_action": {
    "default_icon": "128.png",
    "default_popup": "popup.html",
    "css": "filmwebbooster.css"
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.filmweb.pl/*",
        "*://*.filmdb.pl/*",
        "*://*.openload.co/*",
        "*://*.speedvid.net/*",
        "*://*.vidoza.net/*",
        "*://*.streamango.com/*",
        "*://*.streamcherry.com/*",
        "*://*.fruithosted.net/*",
        "*://*.filmy.to/*",
        "*://*.alltube.tv/*",
        "*://*.alltube.pl/*",
        "*://*.ekino-tv.pl/*",
        "*://*.vshare.io/*",
        "*://*.cda.pl/*",
        "*://*.rapidvideo.com/*",
        "*://*.vidto.me/*",
        "*://*.oload.stream/*",
        "*://*.seriale.co/*",
        "*://*.fili.cc/*",
        "*://*.fboost.pl/*"
      ],
      "js": [
        "jquery-3.3.1.min.js",
        "scrap.js",
        "adblock.js",
        "filmweb.js",
        "filmdb.js",
        "adblock.js"
      ],
      "all_frames": true,
      "css": [
        "filmwebbooster.css"
      ]
    }
  ],
  "permissions": [
    "activeTab",
    "http://fboost.pl/*",
    "https://openload.co",
    "https://crossorigin.me/*"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{6ced8803-5737-4d13-ae02-2cdabaf5f804}"
    }
  }
}