Examine source code of Clean HTML from unwanted

{
  "manifest_version": 2,
  "name": "HTML Cleaner",
  "version": "1.0",
  "description": "Remove unnecessary spans and keep only aria-level and ol start attributes",
  "action": {
    "default_popup": "popup.html",
    "default_icon": {
      "16": "icon16.png",
      "32": "icon32.png",
      "192": "icon192.png"
    }
  },
  "permissions": [
    "clipboardWrite"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{7a610bf4-98e3-482b-9ed1-d2aa143d3faa}"
    }
  }
}