How to Keep a puppeteer instance in NextJS server

I'm using puppeteer in a NextJS server module and Only one instance of the puppeteer Browser (also with login information and some states from some puppeteer pages) is needed. I use globle.myBrowser to keep this instance.(because I don't need a database, so I can't store it in a database), if I don't keep it with globle.myBrowser, NextJs will load this module more than once, so I can't keep the state.

It's all good until when I modify this module, hot reload will not work, because global.myBrowser will still point to the old module and new module will not working.

My questions are:

1. Is there any other better way to keep this instance of puppeteer?
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2. if using globle to track the instance, How can I detect hot reload? I using module.hot.accept but get: "accept is undefined.