Examine source code of Walmart Unit Price

{
  "manifest_version": 3,
  "name": "Walmart Unit Price",
  "version": "2.0.2",
  "permissions": [
    "activeTab",
    "storage"
  ],
  "description": "Filters items on Walmart pages by unit price -- enabling you to find the lowest price by unit.",
  "content_security_policy": {
    "extension_pages": "script-src 'self'; object-src 'self'"
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.walmart.com/*"
      ],
      "js": [
        "content.js"
      ],
      "run_at": "document_start"
    }
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "action": {
    "default_popup": "popup.html",
    "default_icon": {
      "16": "images/icon_16.png",
      "48": "images/icon_48.png",
      "128": "images/icon_128.png"
    }
  },
  "options_ui": {
    "page": "options.html",
    "open_in_tab": false
  },
  "icons": {
    "16": "images/icon_16.png",
    "48": "images/icon_48.png",
    "128": "images/icon_128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{6c20780a-d68b-400f-b9b4-acc4f9ba0552}",
      "strict_min_version": "109.0"
    }
  }
}