Examine source code of Page Sound Mood

{
  "manifest_version": 2,
  "name": "Page Sound Mood",
  "version": "1.0",
  "description": "Phát âm thanh nền theo cảm xúc của nội dung trang.",
  "permissions": [
    "tabs",
    "activeTab"
  ],
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content.js"
      ]
    }
  ],
  "web_accessible_resources": [
    "sounds/*.mp3"
  ],
  "icons": {
    "48": "icon.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{8ac97a1d-68b0-4d9c-be36-4c853c42466a}"
    }
  }
}