Examine source code of PiggySize — True Cost

{
  "manifest_version": 3,
  "name": "PiggySize — True Cost",
  "description": "See what a purchase really costs: hours of your life, and the retirement you'd trade for it.",
  "homepage_url": "https://piggysize.com/browser-extension",
  "permissions": [
    "storage",
    "scripting"
  ],
  "host_permissions": [
    "https://piggysize.com/*",
    "https://*.amazon.com/*",
    "https://*.ebay.com/*",
    "https://*.bestbuy.com/*",
    "https://*.walmart.com/*",
    "https://*.target.com/*"
  ],
  "optional_host_permissions": [
    "https://*/*"
  ],
  "content_scripts": [
    {
      "matches": [
        "https://*.amazon.com/*",
        "https://*.ebay.com/*",
        "https://*.bestbuy.com/*",
        "https://*.walmart.com/*",
        "https://*.target.com/*"
      ],
      "js": [
        "content.js"
      ],
      "run_at": "document_idle"
    }
  ],
  "action": {
    "default_popup": "popup.html",
    "default_title": "PiggySize",
    "default_icon": {
      "16": "icons/icon-16.png",
      "32": "icons/icon-32.png",
      "48": "icons/icon-48.png",
      "128": "icons/icon-128.png"
    }
  },
  "icons": {
    "16": "icons/icon-16.png",
    "32": "icons/icon-32.png",
    "48": "icons/icon-48.png",
    "128": "icons/icon-128.png"
  },
  "web_accessible_resources": [
    {
      "resources": [
        "icons/icon-32.png"
      ],
      "matches": [
        "https://*.amazon.com/*",
        "https://*.ebay.com/*",
        "https://*.bestbuy.com/*",
        "https://*.walmart.com/*",
        "https://*.target.com/*"
      ]
    },
    {
      "resources": [
        "icons/icon-32.png"
      ],
      "matches": [
        "https://*/*"
      ]
    }
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "extension@piggysize.com",
      "strict_min_version": "142.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "version": "1.0.0"
}