Examine source code of Forgetful

{
  "author": "Dreker",
  "manifest_version": 3,
  "name": "Forgetful",
  "version": "1.0.7",
  "description": "Keep chosen sites and tabs out of your browsing history — automatically, without opening a private window.",
  "permissions": [
    "activeTab",
    "tabs",
    "history",
    "storage",
    "unlimitedStorage"
  ],
  "background": {
    "scripts": [
      "background/background.js"
    ]
  },
  "icons": {
    "32": "icons/forgetful-logo-32.png",
    "64": "icons/forgetful-logo-64.png",
    "128": "icons/forgetful-logo-128.png",
    "256": "icons/forgetful-logo-256.png",
    "512": "icons/forgetful-logo-512.png"
  },
  "action": {
    "default_icon": "icons/forgetful-logo-512.png",
    "default_title": "Forgetful",
    "default_popup": "popup/nohistory_page.html"
  },
  "options_ui": {
    "page": "setting/index.html",
    "open_in_tab": true
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{bb2924b3-55a5-43fd-8d49-24117f9ee157}",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}