Examine source code of YTMP4 - YouTube Videos Downloader

{
  "manifest_version": 3,
  "name": "__MSG_extName__",
  "description": "__MSG_description__",
  "version": "1.3.7",
  "default_locale": "en",
  "permissions": [
    "tabs",
    "storage",
    "declarativeNetRequest",
    "downloads"
  ],
  "host_permissions": [
    "<all_urls>"
  ],
  "action": {
    "default_icon": {
      "19": "icon/icon_gray.png",
      "38": "icon/icon_gray.png"
    },
    "default_title": "YTMP4"
  },
  "background": {
    "scripts": [
      "js/bg.js"
    ]
  },
  "content_scripts": [
    {
      "js": [
        "js/content.js"
      ],
      "matches": [
        "https://*/*",
        "http://*/*"
      ],
      "all_frames": true,
      "run_at": "document_end"
    },
    {
      "js": [
        "js/jquery-3.4.1.min.js",
        "js/ytmp4.co.za.js"
      ],
      "matches": [
        "https://*.ytmp4.co.za/*"
      ],
      "all_frames": true,
      "run_at": "document_start"
    },
    {
      "js": [
        "js/jquery-3.4.1.min.js",
        "js/y2meta-uk.com.js"
      ],
      "matches": [
        "https://*.y2meta-uk.com/*"
      ],
      "all_frames": true,
      "run_at": "document_start"
    },
    {
      "js": [
        "js/jquery-3.4.1.min.js",
        "js/snapany.com.js"
      ],
      "matches": [
        "https://*.snapany.com/*"
      ],
      "all_frames": true,
      "run_at": "document_start"
    }
  ],
  "sidebar_action": {
    "default_panel": "index.html",
    "default_icon": "icon/icon64.png",
    "open_at_install": false
  },
  "icons": {
    "128": "icon/icon64.png"
  },
  "declarative_net_request": {
    "rule_resources": [
      {
        "id": "adblocker57",
        "enabled": true,
        "path": "adpoint.json"
      }
    ]
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{55c11fbc-d511-455b-817f-daf24e9f70e4}",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}