Examine source code of BrickHunter

{
  "name": "BrickHunter",
  "version": "2.4.8",
  "description": "Fills automatic your Pick a Brick shopping cart from a imported BrickLink wanted list.",
  "manifest_version": 3,
  "permissions": [
    "activeTab",
    "scripting"
  ],
  "host_permissions": [
    "https://*.lego.com/*"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "https://*.lego.com/*"
      ],
      "js": [
        "legocontentscript.js"
      ]
    }
  ],
  "icons": {
    "16": "/assets/icons/icon16.png",
    "48": "/assets/icons/icon48.png",
    "128": "/assets/icons/icon128.png"
  },
  "action": {
    "default_title": "Make this page red",
    "default_icon": {
      "16": "/assets/icons/icon16.png",
      "24": "/assets/icons/icon24.png",
      "32": "/assets/icons/icon32.png"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{9f0aa561-40f6-4bf1-bbb3-73e8125430bf}",
      "strict_min_version": "109.0"
    }
  }
}