Examine source code of Amazon Brand Detector

{
  "name": "Amazon Brand Detector",
  "description": "A browser extension that identifies Amazon brands and exclusives while you shop online.",
  "version": "0.0.9",
  "manifest_version": 2,
  "content_scripts": [
    {
      "matches": [
        "https://*.amazon.com/*",
        "https://*.amazon.co.uk/*",
        "https://*.amazon.in/*",
        "https://*.amazon.co.jp/*",
        "https://*.amazon.de/*",
        "https://*.amazon.ca/*",
        "https://*.amazon.it/*",
        "https://*.amazon.com.mx/*",
        "https://*.amazon.com.au/*",
        "https://*.amazon.fr/*",
        "https://*.amazon.es/*"
      ],
      "js": [
        "ajax.js",
        "content.js",
        "js-yaml.min.js"
      ],
      "run_at": "document_end"
    }
  ],
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "browser_action": {
    "default_popup": "popup.html",
    "default_icon": {
      "16": "/assets/icons/16.png",
      "19": "/assets/icons/19.png",
      "32": "/assets/icons/32.png",
      "64": "/assets/icons/64.png",
      "128": "/assets/icons/128.png"
    }
  },
  "permissions": [
    "tabs",
    "storage",
    "https://cdn.jsdelivr.net/gh/the-markup/tool-amazon-brand-detector@main/extension/data/api_params.json"
  ],
  "web_accessible_resources": [
    "data/asins.yaml",
    "data/titles.yaml",
    "data/subtitles.yaml",
    "data/api_params.json"
  ],
  "icons": {
    "16": "/assets/icons/16.png",
    "19": "/assets/icons/19.png",
    "32": "/assets/icons/32.png",
    "64": "/assets/icons/64.png",
    "128": "/assets/icons/128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "amazon-brand-detector@markup.org"
    }
  }
}