Examine source code of Passphrase Generator

{
  "manifest_version": 2,
  "name": "Passphrase Generator",
  "version": "1.0.0",
  "description": "Generate strong, memorable passphrases using the built-in EFF wordlist. Fully offline.",
  "browser_specific_settings": {
    "gecko": {
      "id": "{d03a2617-8da6-4bc4-8314-4add9f66cedb}",
      "strict_min_version": "97.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "permissions": [
    "clipboardWrite"
  ],
  "browser_action": {
    "default_icon": {
      "16": "assets/icons/icon16.png",
      "32": "assets/icons/icon32.png",
      "48": "assets/icons/icon48.png",
      "96": "assets/icons/icon96.png"
    },
    "default_title": "Passphrase Generator",
    "default_popup": "src/popup.html"
  },
  "icons": {
    "16": "assets/icons/icon16.png",
    "32": "assets/icons/icon32.png",
    "48": "assets/icons/icon48.png",
    "96": "assets/icons/icon96.png"
  }
}