Examine source code of Video Popup Tool

{
  "description": "__MSG_description__",
  "manifest_version": 2,
  "name": "__MSG_name__",
  "version": "0.2.9",
  "author": "harytfw",
  "icons": {
    "128": "./p-enable.png"
  },
  "permissions": [
    "storage",
    "nativeMessaging"
  ],
  "browser_action": {
    "default_title": "Popup Tool"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "options_ui": {
    "page": "options.html",
    "open_in_tab": true
  },
  "content_scripts": [
    {
      "run_at": "document_end",
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content_script.js"
      ],
      "css": [
        "content_script.css"
      ]
    }
  ],
  "default_locale": "en",
  "applications": {
    "gecko": {
      "id": "popup-tool@harytfw",
      "strict_min_version": "57.0"
    }
  }
}