Examine source code of TabKeeper

{
  "manifest_version": 3,
  "name": "TabKeeper",
  "description": "Save, restore, and organize your browser sessions, tab groups, and history.",
  "version": "2.7.8",
  "author": "mateus2k2",
  "browser_specific_settings": {
    "gecko": {
      "id": "session-buddy@mateusfilipe2k2",
      "strict_min_version": "142.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ],
        "optional": []
      }
    }
  },
  "icons": {
    "16": "icons/icon-16.svg",
    "48": "icons/icon-48.svg",
    "128": "icons/icon-128.svg"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "action": {
    "default_icon": {
      "16": "icons/icon-16.svg",
      "48": "icons/icon-48.svg",
      "128": "icons/icon-128.svg"
    },
    "default_title": "TabKeeper"
  },
  "permissions": [
    "storage",
    "unlimitedStorage",
    "tabs",
    "downloads",
    "alarms",
    "tabGroups",
    "cookies",
    "sessions",
    "identity"
  ],
  "options_ui": {
    "page": "manager/index.html",
    "open_in_tab": true
  },
  "host_permissions": [
    "<all_urls>"
  ]
}