Keep scroll sync

based on scroll roadmap: across synced (https://developer.chrome.com/extensions/storage) 数据同步是基于 实现的。 这是一个用于在不同设备之间同步页面滚动位置的浏览器扩展程序。 position extension data https://github.com/deguang/kee platforms. an for chrome.storage keeping sync is (https://developer.chrome.com/extensions/storage) it's p-scroll-sync/issues/1 chrome.storage page