Examine source code of Douban Rating for Radarr & Sonarr

{
  "manifest_version": 2,
  "name": "豆瓣评分 for Radarr & Sonarr",
  "version": "1.0.1",
  "description": "在 Radarr 和 Sonarr 中显示电影与剧集的豆瓣评分",
  "browser_specific_settings": {
    "gecko": {
      "id": "{f6731982-242f-4199-a861-308f86122f7b}"
    }
  },
  "icons": {
    "16": "images/icon16.png",
    "32": "images/icon32.png",
    "48": "images/icon48.png",
    "128": "images/icon128.png"
  },
  "permissions": [
    "storage",
    "activeTab",
    "<all_urls>"
  ],
  "background": {
    "scripts": [
      "browser-polyfill.js",
      "defaults.js",
      "background.js"
    ],
    "persistent": false
  },
  "browser_action": {
    "default_popup": "popup.html",
    "default_icon": {
      "16": "images/icon16.png",
      "32": "images/icon32.png",
      "48": "images/icon48.png",
      "128": "images/icon128.png"
    }
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "browser-polyfill.js",
        "defaults.js",
        "content.js"
      ],
      "css": [
        "styles.css"
      ]
    }
  ],
  "web_accessible_resources": [
    "api-access.js",
    "defaults.js",
    "react-props-access.js"
  ],
  "options_page": "options.html"
}