Examine source code of Greenberry

{
  "manifest_version": 3,
  "name": "Greenberry",
  "version": "0.1",
  "description": "Greenberry is a browser extension that allows you to manage your email addresses.",
  "developer": {
    "name": "Damblor",
    "url": "https://github.com/damblor/greenberry-ff"
  },
  "action": {
    "default_icon": {
      "128": "icons/favicon.png"
    },
    "default_popup": "popup.html",
    "default_title": "Greenberry"
  },
  "icons": {
    "128": "icons/favicon.png"
  },
  "background": {
    "scripts": [
      "js/crypto-js.min.js",
      "js/background.js"
    ]
  },
  "permissions": [
    "storage",
    "sessions"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "greenberry-ff@moe",
      "strict_min_version": "110.0"
    }
  }
}