Examine source code of FoxyPGP

{
  "name": "__MSG_appName__",
  "description": "__MSG_appDescription__",
  "version": "1.5",
  "default_locale": "en",
  "manifest_version": 3,
  "icons": {
    "128": "icon.png"
  },
  "action": {
    "default_title": "__MSG_appName__"
  },
  "background": {
    "scripts": [
      "background.js"
    ],
    "type": "module"
  },
  "content_scripts": [
    {
      "js": [
        "content.js"
      ],
      "matches": [
        "<all_urls>"
      ]
    }
  ],
  "permissions": [
    "storage",
    "unlimitedStorage",
    "contextMenus"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "FoxyPGP@FoxyPGP"
    }
  }
}