Examine source code of Tip4Search

{
  "manifest_version": 2,
  "name": "Tip4Search",
  "version": "5.0.7",
  "browser_action": {
    "default_popup": "index.html",
    "default_icon": {
      "70": "assets/img/icon-70-70.png"
    }
  },
  "background": {
    "scripts": [
      "browser-polyfill.js",
      "background.js"
    ]
  },
  "permissions": [
    "storage",
    "activeTab",
    "tabs",
    "scripting",
    "webNavigation",
    "https://sam.absolumentpc77-informatique.fr/*",
    "https://www.twitch.tv/*",
    "https://www.twitch.tv/*/*",
    "https://www.twitch.tv/*/*/*",
    "https://www.youtube.com",
    "https://www.youtube.com/*"
  ],
  "content_scripts": [
    {
      "matches": [
        "https://www.twitch.tv/*"
      ],
      "js": [
        "browser-polyfill.js",
        "content.js"
      ],
      "css": [
        "css/fontawesome.min.css",
        "css/regular.min.css",
        "twitch.css"
      ],
      "run_at": "document_start"
    }
  ],
  "web_accessible_resources": [
    "css/fontawesome.min.css",
    "css/regular.min.css",
    "webfonts/fa-regular-400.woff2",
    "modal.html",
    "totem.html"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "moussiertombola1@gmail.com"
    }
  }
}