Examine source code of Permanent Container Tabs

{
  "manifest_version": 2,
  "name": "Permanent Container Tabs",
  "version": "1.0.0",
  "description": "Opens tabs in permanent (non-temporary) containers with right-click context menu.",
  "browser_specific_settings": {
    "gecko": {
      "id": "pct@permanentcontainertabs",
      "strict_min_version": "142.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "icons": {
    "16": "icons/icon.svg",
    "19": "icons/icon.svg",
    "32": "icons/icon.svg",
    "48": "icons/icon.svg",
    "96": "icons/icon.svg",
    "128": "icons/icon.svg"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "options_ui": {
    "page": "preferences/options.html",
    "open_in_tab": false
  },
  "permissions": [
    "tabs",
    "menus",
    "contextMenus",
    "contextualIdentities",
    "cookies",
    "storage",
    "management",
    "bookmarks",
    "<all_urls>"
  ]
}