getLocalDevToolsUrl(browser) {
    ow(browser, ow.object.hasKeys('wsEndpoint'))

    const wsEndpoint = browser.wsEndpoint()
    return new RemoteDevTools.DevToolsLocal(wsEndpoint).url
  }
Convenience function to get the local devtools frontend URL.

@param  {Puppeteer.Browser} browser
@return {string}

@example
const puppeteer = require('puppeteer-extra')
const devtools = require('puppeteer-extra-plugin-devtools')()
puppeteer.use(devtools)

puppeteer.launch().then(async browser => {
  console.log(devtools.getLocalDevToolsUrl(browser))
  // => http://localhost:55952
})