Examine source code of proc123

{
  "manifest_version": 3,
  "name": "proc123",
  "version": "1.4.3",
  "description": "Scan a store's category page and export a CSV another store can import.",
  "browser_specific_settings": {
    "gecko": {
      "id": "proc123-addon@hami9.github.io",
      "strict_min_version": "128.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ],
        "optional": [
          "websiteContent"
        ]
      }
    }
  },
  "icons": {
    "16": "icons/icon-16.png",
    "32": "icons/icon-32.png",
    "48": "icons/icon-48.png",
    "96": "icons/icon-96.png",
    "128": "icons/icon-128.png"
  },
  "action": {
    "default_popup": "popup.html",
    "default_title": "Scan this category with proc123",
    "default_icon": {
      "16": "icons/icon-16.png",
      "32": "icons/icon-32.png",
      "48": "icons/icon-48.png",
      "96": "icons/icon-96.png"
    }
  },
  "background": {
    "scripts": [
      "background.js"
    ],
    "type": "module"
  },
  "permissions": [
    "activeTab",
    "scripting",
    "storage"
  ],
  "optional_host_permissions": [
    "*://*/*"
  ]
}