Examine source code of tabvault-sessions

{
  "manifest_version": 2,
  "name": "TabVault",
  "version": "1.0.0",
  "description": "Save your browser sessions in one click. Auto-save on close, scheduled saves, and instant restore. Your tabs, preserved.",
  "author": "brian",
  "homepage_url": "https://ko-fi.com/espressocontext",
  "icons": {
    "48": "icons/48.png",
    "96": "icons/96.png",
    "128": "icons/128.png"
  },
  "browser_action": {
    "default_popup": "popup.html",
    "default_icon": {
      "48": "icons/48.png",
      "96": "icons/96.png",
      "128": "icons/128.png"
    },
    "default_title": "TabVault — session saver"
  },
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": true
  },
  "permissions": [
    "tabs",
    "storage",
    "sessions"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "tabvault@espressocontext",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ],
        "optional": []
      }
    }
  }
}