Examine source code of ClearCart: Hide Junk on Amazon & Walmart

{
  "manifest_version": 3,
  "name": "ClearCart: Hide Junk on Amazon & Walmart",
  "version": "1.10.0",
  "description": "Filters gibberish no-name brands and dropship junk out of Amazon and Walmart search results. 100% local — no data collected.",
  "permissions": [
    "storage",
    "alarms"
  ],
  "host_permissions": [
    "https://*.amazon.com/s*",
    "https://*.amazon.com/dp/*",
    "https://*.amazon.com/*/dp/*",
    "https://*.amazon.com/gp/product/*",
    "https://*.amazon.ca/s*",
    "https://*.amazon.ca/dp/*",
    "https://*.amazon.ca/*/dp/*",
    "https://*.amazon.ca/gp/product/*",
    "https://*.amazon.co.uk/s*",
    "https://*.amazon.co.uk/dp/*",
    "https://*.amazon.co.uk/*/dp/*",
    "https://*.amazon.co.uk/gp/product/*",
    "https://*.amazon.com.au/s*",
    "https://*.amazon.com.au/dp/*",
    "https://*.amazon.com.au/*/dp/*",
    "https://*.amazon.com.au/gp/product/*",
    "https://*.amazon.in/s*",
    "https://*.amazon.in/dp/*",
    "https://*.amazon.in/*/dp/*",
    "https://*.amazon.in/gp/product/*",
    "https://www.walmart.com/search*",
    "https://www.walmart.com/ip/*",
    "https://extensionpay.com/*"
  ],
  "background": {
    "scripts": [
      "vendor/ExtPay.js",
      "src/background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "https://*.amazon.com/s*",
        "https://*.amazon.ca/s*",
        "https://*.amazon.co.uk/s*",
        "https://*.amazon.com.au/s*",
        "https://*.amazon.in/s*"
      ],
      "js": [
        "src/selectors.js",
        "src/config.js",
        "src/scoring.js",
        "src/review-prompt.js",
        "src/content.js"
      ],
      "css": [
        "src/content.css"
      ],
      "run_at": "document_idle"
    },
    {
      "matches": [
        "https://*.amazon.com/dp/*",
        "https://*.amazon.com/*/dp/*",
        "https://*.amazon.com/gp/product/*",
        "https://*.amazon.ca/dp/*",
        "https://*.amazon.ca/*/dp/*",
        "https://*.amazon.ca/gp/product/*",
        "https://*.amazon.co.uk/dp/*",
        "https://*.amazon.co.uk/*/dp/*",
        "https://*.amazon.co.uk/gp/product/*",
        "https://*.amazon.com.au/dp/*",
        "https://*.amazon.com.au/*/dp/*",
        "https://*.amazon.com.au/gp/product/*",
        "https://*.amazon.in/dp/*",
        "https://*.amazon.in/*/dp/*",
        "https://*.amazon.in/gp/product/*"
      ],
      "js": [
        "src/selectors.js",
        "src/config.js",
        "src/scoring.js",
        "src/product.js"
      ],
      "css": [
        "src/content.css"
      ],
      "run_at": "document_idle"
    },
    {
      "matches": [
        "https://www.walmart.com/search*",
        "https://www.walmart.com/ip/*"
      ],
      "js": [
        "src/selectors.js",
        "src/config.js",
        "src/scoring.js",
        "src/review-prompt.js",
        "src/content.js",
        "src/product.js"
      ],
      "css": [
        "src/content.css"
      ],
      "run_at": "document_idle"
    },
    {
      "matches": [
        "https://extensionpay.com/*"
      ],
      "js": [
        "vendor/ExtPay.js"
      ],
      "run_at": "document_start"
    }
  ],
  "action": {
    "default_popup": "src/popup/popup.html",
    "default_icon": {
      "16": "icons/icon16.png",
      "48": "icons/icon48.png",
      "128": "icons/icon128.png"
    }
  },
  "icons": {
    "16": "icons/icon16.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "web_accessible_resources": [
    {
      "resources": [
        "data/known-brands.json",
        "data/house-brands.json",
        "data/walmart-house-brands.json",
        "data/ngrams.json"
      ],
      "matches": [
        "https://*.amazon.com/*",
        "https://*.amazon.ca/*",
        "https://*.amazon.co.uk/*",
        "https://*.amazon.com.au/*",
        "https://*.amazon.in/*",
        "https://www.walmart.com/*"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "clearcart@clearcart.org",
      "strict_min_version": "142.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}