Examine source code of Image Data

{
  "manifest_version": 3,
  "name": "Image Data",
  "version": "2.6.3",
  "description": "Show image resolution, file type, and file size on mouse over",
  "browser_specific_settings": {
    "gecko": {
      "id": "{b8ecb56e-f778-4df4-962a-52974b36abdd}",
      "strict_min_version": "58.0"
    }
  },
  "action": {
    "default_icon": {
      "48": "icons/thumb-48.png"
    }
  },
  "icons": {
    "48": "icons/thumb-48.png"
  },
  "commands": {
    "_execute_action": {
      "description": "Toggle Display"
    }
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "defaults.js",
        "imgdata.js"
      ],
      "run_at": "document_end"
    }
  ],
  "options_ui": {
    "page": "options.html"
  },
  "host_permissions": [
    "<all_urls>"
  ],
  "permissions": [
    "storage"
  ]
}