Examine source code of AutoArsenalTicket

{
  "manifest_version": 2,
  "name": "AutoArsenalTicket",
  "version": "1.0",
  "description": "Automatically refresh the arsenal ticket selling page till one available ticket is found",
  "icons": {
    "48": "icons/arsenal.svg"
  },
  "permissions": [
    "activeTab"
  ],
  "browser_action": {
    "default_icon": "icons/arsenal.svg",
    "default_title": "autoTicket",
    "default_popup": "popup/activate.html"
  },
  "content_scripts": [
    {
      "matches": [
        "https://www.eticketing.co.uk/arsenal/*"
      ],
      "js": [
        "main.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{ae192e25-0cc5-4751-854f-ee3f75b0d1a4}"
    }
  }
}