Examine source code of Review Rank

{
  "manifest_version": 3,
  "name": "Review Rank",
  "version": "0.1.0",
  "description": "Force Prime-only Amazon search results, sort by review rank, block sponsored posts, hide low-review products, and optionally apply a brand allowlist.",
  "permissions": [
    "storage",
    "alarms",
    "webNavigation"
  ],
  "host_permissions": [
    "https://raw.githubusercontent.com/chris-mosley/AmazonBrandFilterList/*"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "prime-rank-filter@primerank.dev",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ],
        "optional": []
      }
    }
  },
  "content_security_policy": {
    "extension_pages": "script-src 'self'; object-src 'none'"
  },
  "background": {
    "service_worker": "background.js",
    "scripts": [
      "prime-rank-shared.js",
      "amazon-brand-whitelist.js",
      "background.js"
    ]
  },
  "action": {
    "default_title": "Review Rank",
    "default_popup": "popup.html",
    "default_icon": {
      "16": "icons/icon-16.png",
      "48": "icons/icon-48.png",
      "96": "icons/icon-96.png"
    }
  },
  "icons": {
    "16": "icons/icon-16.png",
    "48": "icons/icon-48.png",
    "96": "icons/icon-96.png"
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.amazon.com/*",
        "*://*.amazon.ca/*",
        "*://*.amazon.cn/*",
        "*://*.amazon.co.uk/*",
        "*://*.amazon.co.za/*",
        "*://*.amazon.de/*",
        "*://*.amazon.fr/*",
        "*://*.amazon.it/*",
        "*://*.amazon.es/*",
        "*://*.amazon.nl/*",
        "*://*.amazon.se/*",
        "*://*.amazon.pl/*",
        "*://*.amazon.com.au/*",
        "*://*.amazon.com.br/*",
        "*://*.amazon.com.mx/*",
        "*://*.amazon.co.jp/*",
        "*://*.amazon.in/*",
        "*://*.amazon.sg/*",
        "*://*.amazon.ae/*",
        "*://*.amazon.sa/*",
        "*://*.amazon.com.tr/*",
        "*://*.amazon.eg/*",
        "*://*.amazon.com.be/*"
      ],
      "js": [
        "prime-rank-shared.js",
        "content-script.js"
      ],
      "run_at": "document_idle"
    }
  ]
}