Examine source code of Keepa.com - Amazon Price Tracker

{
  "name": "Keepa - Amazon Price Tracker",
  "short_name": "Keepa",
  "version": "5.64",
  "permissions": [
    "storage",
    "cookies",
    "contextMenus"
  ],
  "author": "Keepa GmbH",
  "background": {
    "scripts": [
      "keepa.js"
    ]
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "amptra@keepa.com",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "browsingActivity",
          "authenticationInfo"
        ],
        "optional": [
          "technicalAndInteraction"
        ]
      }
    },
    "gecko_android": {
      "strict_min_version": "142.0"
    }
  },
  "host_permissions": [
    "*://*.keepa.com/*",
    "*://*.amazon.com/*",
    "*://*.amzn.com/*",
    "*://*.amazon.co.uk/*",
    "*://*.amazon.de/*",
    "*://*.amazon.fr/*",
    "*://*.amazon.it/*",
    "*://*.amazon.ca/*",
    "*://*.amazon.com.mx/*",
    "*://*.amazon.es/*",
    "*://*.amazon.co.jp/*",
    "*://*.amazon.in/*",
    "*://*.amazon.com.br/*",
    "*://*.amazon.nl/*",
    "*://*.amazon.com.au/*"
  ],
  "web_accessible_resources": [
    {
      "resources": [
        "selectionHook.js"
      ],
      "matches": [
        "*://*.amzn.com/*",
        "*://*.amazon.com/*",
        "*://*.amazon.ca/*",
        "*://*.amazon.com.mx/*",
        "*://*.amazon.co.uk/*",
        "*://*.amazon.de/*",
        "*://*.amazon.fr/*",
        "*://*.amazon.it/*",
        "*://*.amazon.es/*",
        "*://*.amazon.co.jp/*",
        "*://*.amazon.in/*",
        "*://*.amazon.com.br/*",
        "*://*.amazon.nl/*",
        "*://*.amazon.com.au/*"
      ]
    }
  ],
  "manifest_version": 3,
  "homepage_url": "https://keepa.com",
  "content_scripts": [
    {
      "all_frames": true,
      "js": [
        "content.js"
      ],
      "matches": [
        "*://*.keepa.com/*",
        "*://*.amzn.com/*",
        "*://*.amazon.com/*",
        "*://*.amazon.ca/*",
        "*://*.amazon.com.mx/*",
        "*://*.amazon.co.uk/*",
        "*://*.amazon.de/*",
        "*://*.amazon.fr/*",
        "*://*.amazon.it/*",
        "*://*.amazon.es/*",
        "*://*.amazon.co.jp/*",
        "*://*.amazon.in/*",
        "*://*.amazon.com.br/*",
        "*://*.amazon.nl/*",
        "*://*.amazon.com.au/*"
      ],
      "run_at": "document_start"
    }
  ],
  "options_ui": {
    "page": "options.html",
    "open_in_tab": false
  },
  "action": {
    "default_icon": {
      "32": "icons/i32.png",
      "48": "icons/i48.png"
    },
    "default_title": "Keepa automatically loads on Amazon product pages."
  },
  "description": "Adds price history charts and the option to be alerted on price drops to all Amazon sites.",
  "icons": {
    "16": "icons/i16.png",
    "32": "icons/i32.png",
    "48": "icons/i48.png",
    "128": "icons/i128.png"
  }
}