Examine source code of Which Font?

{
  "manifest_version": 3,
  "name": "Which Font?",
  "version": "0.0.1",
  "description": "Inspect any DOM element and instantly view its typography and styling details.",
  "permissions": [
    "storage"
  ],
  "action": {
    "default_title": "Which Font? — Click to turn on inspection",
    "default_icon": {
      "16": "public/icons/off/icon16.png",
      "32": "public/icons/off/icon32.png",
      "48": "public/icons/off/icon48.png"
    }
  },
  "background": {
    "scripts": [
      "service-worker-loader.js"
    ],
    "type": "module"
  },
  "content_scripts": [
    {
      "js": [
        "assets/main.tsx-loader-DsMYtCMi.js"
      ],
      "matches": [
        "<all_urls>"
      ],
      "run_at": "document_idle"
    }
  ],
  "commands": {
    "toggle-inspection": {
      "suggested_key": {
        "default": "Alt+Shift+I",
        "mac": "Alt+Shift+I"
      },
      "description": "Toggle inspection mode"
    },
    "close-cards": {
      "suggested_key": {
        "default": "Alt+Shift+C",
        "mac": "Alt+Shift+C"
      },
      "description": "Close top card or exit inspection"
    }
  },
  "icons": {
    "16": "public/icons/icon16.png",
    "32": "public/icons/icon32.png",
    "48": "public/icons/icon48.png",
    "128": "public/icons/icon128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "hello@whichfont.hagersew.com",
      "strict_min_version": "109.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "web_accessible_resources": [
    {
      "matches": [
        "<all_urls>"
      ],
      "resources": [
        "assets/storage-wfaX33kd.js",
        "assets/main.tsx-Bu2RmQXm.js"
      ]
    }
  ]
}