Examine source code of Combined Chinese Annotator

{
  "manifest_version": 3,
  "name": "Combined Chinese Annotator",
  "version": "0.2.2",
  "description": "Toggle Jyutping, Pinyin, and offline English gloss annotations on Chinese text.",
  "icons": {
    "32": "32.png",
    "48": "48.png",
    "96": "96.png",
    "128": "128.png"
  },
  "permissions": [
    "storage",
    "contextMenus",
    "scripting"
  ],
  "host_permissions": [
    "<all_urls>"
  ],
  "background": {
    "scripts": [
      "core.js",
      "stroke-codec-v2.js",
      "user-store.js",
      "opencc.js",
      "converter.js",
      "pinyin-web-engine.js",
      "background.js"
    ]
  },
  "action": {
    "default_title": "Chinese Annotator",
    "default_popup": "popup-v2.html",
    "default_icon": {
      "32": "32.png",
      "48": "48.png",
      "96": "96.png"
    }
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "core.js",
        "content.js",
        "overlay.js"
      ],
      "css": [
        "annotation.css"
      ],
      "run_at": "document_idle",
      "all_frames": true
    }
  ],
  "commands": {
    "toggle-jyutping": {
      "suggested_key": {
        "default": "Alt+Shift+J",
        "mac": "Alt+Shift+J"
      },
      "description": "Toggle Jyutping Annotations"
    },
    "toggle-pinyin": {
      "suggested_key": {
        "default": "Alt+Shift+P",
        "mac": "Alt+Shift+P"
      },
      "description": "Toggle Pinyin Annotations"
    },
    "toggle-english": {
      "suggested_key": {
        "default": "Alt+Shift+E",
        "mac": "Alt+Shift+E"
      },
      "description": "Toggle English Annotations"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{83ed8816-aa14-4222-8fb9-7ee58894b3f3}",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    },
    "gecko_android": {
      "id": "{83ed8816-aa14-4222-8fb9-7ee58894b3f3}",
      "strict_min_version": "142.0"
    }
  }
}