Examine source code of Cartel Registration Assistant

{
  "description": "A bit of help to make the purchasing process as smooth as possible when you buy tickets through the Cartel",
  "version": "0.0.37",
  "manifest_version": 2,
  "name": "Cartel Registration Assistant",
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "permissions": [
    "storage",
    "clipboardWrite",
    "tabs",
    "activeTab",
    "contextualIdentities",
    "cookies"
  ],
  "browser_action": {
    "default_popup": "popup.html",
    "default_icon": "icon-48.png"
  },
  "content_scripts": [
    {
      "matches": [
        "http://cartel-glasto.atwebpages.com/*",
        "https://glastonbury.seetickets.com/*",
        "https://www.gigsandtours.com/*",
        "https://test-site.cartel.gritz.co.uk/*",
        "https://cartel-glasto.localhost/*",
        "http://localhost:8080/*"
      ],
      "exclude_matches": [
        "https://glastonbury.seetickets.com/*/checkout",
        "https://www.gigsandtours.com/*/checkout",
        "https://test-site.cartel.gritz.co.uk/*/checkout",
        "https://test-site.gritz.co.uk/*/checkout",
        "https://cartel-glasto.localhost/*/checkout",
        "http://localhost:8080/*/checkout"
      ],
      "js": [
        "content.js"
      ]
    }
  ],
  "web_accessible_resources": [
    "icon-128.png",
    "cartel-logo.jpg"
  ],
  "options_ui": {
    "page": "options.html",
    "open_in_tab": true,
    "browser_style": true
  },
  "icons": {
    "48": "icon-48.png",
    "128": "icon-128.png"
  },
  "commands": {
    "reload_extension": {
      "suggested_key": {
        "default": "Alt+W"
      },
      "description": "Reload the extension"
    }
  },
  "content_security_policy": "script-src 'self'; object-src 'self';",
  "browser_specific_settings": {
    "gecko": {
      "id": "{1ad8ed7b-647e-4c25-90fe-40ee62f0eb5e}"
    }
  }
}