Backup Chrome synced tabs!

synced-tabs.js

// use this in PC-Chrome history page (ctrl+H)
var itemList = Array.from(document.
  getElementById('history-app').shadowRoot.getElementById('synced-devices').shadowRoot.
  getElementById('synced-device-list').getElementsByTagName('history-synced-device-card')).
  map(x=>x.shadowRoot.getElementById('tab-item-list')).map(x=>x.getElementsByClassName('website-link'));

// if you want to backup only one device, enter a index number here (start from 0)

// I suggest you use extension OneTab to manage tabs, so I export OneTab's url format
// <url> | <title>
// Please notice that google WILL NOT sync all tabs if your have more than ~700+ tabs.

var index = 1;
var urls = Array.from(itemList[index]).map(x=>`${x.href} | ${x.title}`);
var result = urls.join('\n');