Examine source code of Categorian

{
  "description": "Categorian Extension provides quick access to your blog and other features of categorian.com.",
  "manifest_version": 2,
  "name": "Categorian",
  "version": "1.1resigned1",
  "homepage_url": "https://categorian.com",
  "browser_action": {
    "default_icon": {
      "48": "icons/caticon.png"
    },
    "default_title": "Categorian",
    "default_popup": "popup/menu.html",
    "browser_style": true
  },
  "permissions": [
    "activeTab",
    "tabs"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{990544c4-98da-4042-9dee-b75861b141f4}"
    }
  }
}