Examine source code of Add Image to PDF

{
  "manifest_version": 3,
  "name": "__MSG_appName__",
  "description": "__MSG_shortDesc__",
  "default_locale": "en",
  "version": "1.0.2",
  "browser_specific_settings": {
    "gecko": {
      "id": "add-image-to-pdf@add-image-to-pdf.xyz",
      "strict_min_version": "121.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "background": {
    "scripts": [
      "background/background.js"
    ]
  },
  "action": {
    "default_icon": {
      "16": "icons/icon16.png",
      "48": "icons/icon48.png",
      "128": "icons/icon128.png"
    }
  },
  "icons": {
    "16": "icons/icon16.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  }
}