Examine source code of WMTWIN

{
  "version": "2.6.1",
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "services@wmtwin.com"
    }
  },
  "manifest_version": 3,
  "name": "WMTWIN",
  "action": {
    "default_icon": "icons/32.png",
    "default_popup": "popup.html"
  },
  "icons": {
    "24": "icons/24.png",
    "32": "icons/32.png",
    "48": "icons/48.png",
    "64": "icons/64.png",
    "128": "icons/128.png"
  },
  "minimum_chrome_version": "88",
  "content_scripts": [
    {
      "js": [
        "content.js"
      ],
      "run_at": "document_idle",
      "world": "ISOLATED",
      "all_frames": false,
      "matches": [
        "https://*.walmart.com/*"
      ]
    },
    {
      "js": [
        "master.js"
      ],
      "run_at": "document_start",
      "all_frames": false,
      "matches": [
        "*://wmtwin.com/*"
      ]
    }
  ],
  "permissions": [
    "storage",
    "tabs",
    "downloads"
  ],
  "host_permissions": [
    "*://*.walmart.com/*",
    "*://ip.guide/*",
    "*://*.wmtwin.com/*"
  ]
}