Examine source code of Roadblock

{
  "manifest_version": 3,
  "name": "Roadblock",
  "version": "1.2",
  "description": "Site blocker with overrides.",
  "icons": {
    "48": "icons/border-48.png"
  },
  "action": {
    "default_icon": "icons/border-48.png",
    "default_title": "action testing",
    "default_popup": "options.html"
  },
  "background": {
    "scripts": [
      "background.js"
    ],
    "type": "module"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "roadblock@5f748112-260f-4ca4-a678-823a5d8d2857",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "options_ui": {
    "page": "options.html",
    "open_in_tab": true
  },
  "permissions": [
    "tabs",
    "menus",
    "storage"
  ]
}