Examine source code of LingLook - Lookup Chinese

{
  "manifest_version": 2,
  "name": "LingLook",
  "author": "Phong Phan",
  "version": "1.2.2",
  "browser_specific_settings": {
    "gecko": {
      "id": "linglook@phongp.com",
      "strict_min_version": "113.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    },
    "gecko_android": {}
  },
  "description": "__MSG_extension_description__",
  "default_locale": "en",
  "minimum_chrome_version": "100",
  "icons": {
    "16": "images/linglook.svg",
    "32": "images/linglook.svg",
    "48": "images/linglook.svg",
    "96": "images/linglook.svg",
    "128": "images/linglook.svg"
  },
  "permissions": [
    "storage"
  ],
  "background": {
    "persistent": false,
    "scripts": [
      "linglook-background.js"
    ]
  },
  "browser_action": {
    "browser_style": false,
    "default_icon": "images/linglook-disabled.svg",
    "default_title": "__MSG_command_toggle_disabled__"
  },
  "options_ui": {
    "page": "options.html"
  },
  "content_scripts": [
    {
      "matches": [
        "http://*/*",
        "https://*/*",
        "file:///*"
      ],
      "match_about_blank": true,
      "js": [
        "linglook-content.js"
      ],
      "all_frames": true,
      "run_at": "document_start"
    },
    {
      "matches": [
        "https://docs.google.com/*"
      ],
      "js": [
        "linglook-gdocs-bootstrap.js"
      ],
      "all_frames": true,
      "run_at": "document_start",
      "world": "MAIN"
    }
  ],
  "web_accessible_resources": [
    "css/popup-fonts.css",
    "css/selection.css",
    "data/hanzi-writer-data/*.json",
    "fonts/*.woff2"
  ],
  "commands": {
    "_execute_browser_action": {
      "suggested_key": {
        "default": "Alt+O"
      },
      "description": "__MSG_command_toggle_description__"
    }
  }
}