Examine source code of CantoTranslate

{
  "manifest_version": 2,
  "name": "CantoTranslate",
  "description": "This extension helps you learn Cantonese straight from your browser, by creating a Cantonese Popover Dictionary!",
  "version": "1.3",
  "icons": {
    "128": "128.png"
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "WebSpeech/WebSpeech.js",
        "js/vendor.js",
        "js/content_script.js"
      ]
    }
  ],
  "background": {
    "scripts": [
      "js/background.js"
    ]
  },
  "permissions": [
    "storage"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "cantotranslate@example.com",
      "strict_min_version": "58.0"
    }
  },
  "web_accessible_resources": [
    "icons8-sound.ico",
    "icons8-disabled.ico"
  ]
}