Examine source code of ShopBuddy UK

{
  "name": "ShopBuddy UK",
  "version": "4.0.13.0",
  "description": "Earn points for Pounds from 1,000s of online stores with ShopBuddy.",
  "homepage_url": "https://uk.shop.com",
  "browser_action": {
    "default_icon": {
      "20": "./icons/20x20.png"
    },
    "default_title": "ShopBuddy United Kingdom"
  },
  "author": "shop.com",
  "manifest_version": 2,
  "permissions": [
    "tabs",
    "webRequest",
    "storage",
    "alarms",
    "<all_urls>"
  ],
  "background": {
    "scripts": [
      "vendors/bundle.js",
      "background/bundle.js"
    ],
    "persistent": true
  },
  "content_scripts": [
    {
      "all_frames": false,
      "js": [
        "vendors/bundle.js",
        "content/bundle.js"
      ],
      "matches": [
        "<all_urls>"
      ],
      "run_at": "document_idle"
    }
  ],
  "icons": {
    "24": "./icons/24x24.png",
    "48": "./icons/48x48.png",
    "128": "./icons/128x128.png"
  },
  "web_accessible_resources": [
    "content/*.css",
    "content/*.svg",
    "icons/*.png"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{7434d19c-2749-4a0f-bac2-b935ad16b8d7}"
    }
  }
}