Examine source code of Auto Close Tabs

{
  "author": "igorlogius",
  "browser_specific_settings": {
    "gecko": {
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      },
      "id": "{bc4e2883-5762-4306-81dc-32ebe7136404}"
    }
  },
  "homepage_url": "https://github.com/igorlogius/webextensions/tree/main/sources/auto-close-tabs",
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "default_area": "navbar"
  },
  "description": "automatically close tabs which have not been accessed for a time",
  "icons": {
    "256": "icon.png"
  },
  "manifest_version": 2,
  "name": "Auto Close Tabs",
  "permissions": [
    "contextualIdentities",
    "cookies",
    "bookmarks",
    "tabs",
    "storage"
  ],
  "options_ui": {
    "page": "options.html"
  },
  "incognito": "not_allowed",
  "version": "1.8.35"
}