Examine source code of Seedboxes.cc

{
  "name": "Seedboxes.cc",
  "version": "2.0.5resigned1",
  "manifest_version": 2,
  "description": "Fast access to your Seedboxes.cc account",
  "author": "Seedboxes.cc",
  "homepage_url": "https://www.seedboxes.cc",
  "content_security_policy": "script-src 'self' 'unsafe-eval'; object-src 'self'",
  "applications": {
    "gecko": {
      "id": "info@seedboxes.cc",
      "strict_min_version": "57.0"
    }
  },
  "options_ui": {
    "page": "views/options.html"
  },
  "background": {
    "scripts": [
      "js/jquery-3.3.1.min.js",
      "js/bootstrap.min.js",
      "js/options.js",
      "js/handlebars-v2.0.0.js",
      "js/popup.js"
    ]
  },
  "icons": {
    "48": "images/icon_48x48.png",
    "128": "images/icon_128x128.png"
  },
  "permissions": [
    "storage",
    "notifications",
    "https://www.seedboxes.cc/"
  ],
  "browser_action": {
    "default_icon": "images/icon.png",
    "default_popup": "views/popup.html"
  }
}