Examine source code of Shudu 舒讀

{
  "manifest_version": 2,
  "name": "Shudu 舒讀",
  "version": "1.4.2",
  "description": "Shudu 為一個開源文字處理平台，目的是讓閱讀者能夠舒服的閱讀、編寫文案。",
  "homepage_url": "https://shudu.jackkuo.org/",
  "default_locale": "zh_TW",
  "browser_specific_settings": {
    "gecko": {
      "id": "{6eed3cfe-61f2-4057-a5e0-9898c1b668d8}",
      "strict_min_version": "60.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "icons": {
    "128": "icons/book_128.png"
  },
  "browser_action": {
    "default_title": "Shudu"
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "exclude_matches": [
        "*://docs.google.com/document/*"
      ],
      "js": [
        "shudu.js",
        "libs/pangu.js"
      ],
      "run_at": "document_end",
      "all_frames": true
    }
  ],
  "background": {
    "scripts": [
      "background.js",
      "libs/opencc/opencc.js"
    ]
  },
  "content_security_policy": "script-src 'self' 'wasm-unsafe-eval'; object-src 'self'",
  "options_ui": {
    "page": "options.html"
  },
  "permissions": [
    "http://*/*",
    "https://*/*",
    "activeTab",
    "storage"
  ],
  "web_accessible_resources": [
    "libs/opencc/*"
  ]
}