Examine source code of Amazon Unit Price

{
  "manifest_version": 3,
  "name": "Amazon Unit Price",
  "version": "2.2.5",
  "permissions": [
    "storage"
  ],
  "host_permissions": [
    "*://*.amazon.com/*",
    "*://*.amazon.ca/*",
    "*://*.amazon.co.uk/*",
    "*://*.amazon.de/*",
    "*://*.amazon.fr/*",
    "*://*.amazon.it/*",
    "*://*.amazon.es/*",
    "*://*.amazon.co.jp/*",
    "*://*.amazon.cn/*",
    "*://*.amazon.in/*",
    "*://*.amazon.com.mx/*",
    "*://*.amazon.com.br/*",
    "*://*.amazon.com.au/*",
    "*://*.amazon.nl/*",
    "*://*.amazon.se/*",
    "*://*.amazon.pl/*",
    "*://*.amazon.sg/*",
    "*://*.amazon.com.tr/*",
    "*://*.amazon.ae/*",
    "*://*.amazon.sa/*",
    "*://*.amazon.com.be/*",
    "*://*.amazon.eg/*",
    "*://*.amazon.ie/*",
    "*://*.amazon.co.za/*",
    "*://*.amazon.lu/*",
    "*://*.amazon.at/*",
    "*://*.amazon.ch/*",
    "*://*.amazon.co.nz/*"
  ],
  "description": "Filters items on Amazon pages by unit price -- enabling you to find the lowest price by unit!",
  "content_security_policy": {
    "extension_pages": "script-src 'self'; object-src 'self'"
  },
  "web_accessible_resources": [
    {
      "resources": [
        "changelog-content.js",
        "markdown-parser.js",
        "popup.js"
      ],
      "matches": [
        "<all_urls>"
      ]
    }
  ],
  "content_scripts": [
    {
      "matches": [
        "*://*.amazon.com/*",
        "*://*.amazon.ca/*",
        "*://*.amazon.co.uk/*",
        "*://*.amazon.de/*",
        "*://*.amazon.fr/*",
        "*://*.amazon.it/*",
        "*://*.amazon.es/*",
        "*://*.amazon.co.jp/*",
        "*://*.amazon.cn/*",
        "*://*.amazon.in/*",
        "*://*.amazon.com.mx/*",
        "*://*.amazon.com.br/*",
        "*://*.amazon.com.au/*",
        "*://*.amazon.nl/*",
        "*://*.amazon.se/*",
        "*://*.amazon.pl/*",
        "*://*.amazon.sg/*",
        "*://*.amazon.com.tr/*",
        "*://*.amazon.ae/*",
        "*://*.amazon.sa/*",
        "*://*.amazon.com.be/*",
        "*://*.amazon.eg/*",
        "*://*.amazon.lu/*",
        "*://*.amazon.at/*",
        "*://*.amazon.ch/*",
        "*://*.amazon.ie/*",
        "*://*.amazon.co.nz/*",
        "*://*.amazon.co.za/*"
      ],
      "js": [
        "content.js"
      ],
      "run_at": "document_start"
    }
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "action": {
    "default_popup": "popup.html?ui=popup",
    "default_icon": {
      "16": "images/icon_16.png",
      "48": "images/icon_48.png",
      "128": "images/icon_128.png"
    }
  },
  "options_ui": {
    "page": "options.html"
  },
  "icons": {
    "16": "images/icon_16.png",
    "48": "images/icon_48.png",
    "128": "images/icon_128.png",
    "256": "images/icon_256.png",
    "512": "images/icon_512.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{1b1ab28e-b825-4e9c-895a-69343a50dd2f}",
      "strict_min_version": "109.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "sidebar_action": {
    "default_panel": "sidepanel.html",
    "default_icon": {
      "16": "images/icon_16.png",
      "48": "images/icon_48.png",
      "128": "images/icon_128.png",
      "256": "images/icon_256.png",
      "512": "images/icon_512.png"
    },
    "default_title": "Unit Price Sidebar",
    "open_at_install": false
  }
}