Examine source code of List Sources

{
  "manifest_version": 2,
  "name": "__MSG_extensionName__",
  "description": "__MSG_extensionDescription__",
  "version": "0.0.4resigned1",
  "default_locale": "en",
  "developer": {
    "name": "Ng Guoyou",
    "url": "https://github.com/gyng/list-sources"
  },
  "homepage_url": "https://github.com/gyng/list-sources",
  "background": {
    "scripts": [
      "src/background/index.js"
    ]
  },
  "permissions": [
    "<all_urls>",
    "activeTab",
    "tabs",
    "downloads",
    "webRequest"
  ],
  "commands": {
    "toggle-active": {
      "suggested_key": {
        "default": "Ctrl+Shift+V"
      }
    }
  },
  "browser_action": {
    "default_icon": {
      "16": "icons/ic_photo_library_black_48dp_2x.png",
      "32": "icons/ic_photo_library_black_48dp_2x.png"
    },
    "default_title": "List sources (Ctrl+Shift+V)"
  },
  "icons": {
    "48": "icons/ic_photo_library_black_48dp_1x.png",
    "96": "icons/ic_photo_library_black_48dp_2x.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{eb4c37d8-f45f-4e83-b6dc-5b70b3dc3c6b}"
    }
  }
}