Examine source code of Image Metadata Viewer

{
  "manifest_version": 3,
  "name": "Image Metadata Viewer",
  "description": "View EXIF/meta data of images",
  "version": "0.2.1",
  "permissions": [
    "activeTab",
    "contextMenus",
    "scripting"
  ],
  "host_permissions": [
    "*://*/*"
  ],
  "web_accessible_resources": [
    {
      "resources": [
        "img-metadata-inspector.js",
        "img-metadata-inspector-loader.js",
        "json5.js",
        "popover.html",
        "style.css",
        "icons/*"
      ],
      "matches": [
        "<all_urls>"
      ]
    }
  ],
  "background": {
    "scripts": [
      "background.js"
    ],
    "type": "module"
  },
  "action": {
    "default_icon": "icon.png"
  },
  "icons": {
    "48": "icon.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "imgmetadatainspector@jorticus.com"
    }
  }
}