You are checking if (page) on line L120 and L129. If it's supposed to be run only if page is true you can combine those two if blocks into one. Logic would stay the same.

This should be done always, if page is set. Independant of what we want to close.

tbh logic would stay the same if you will change lines L120-L132 to:

if (puppeteerConfig.browserContext === 'incognito' && context) {
  await context.close()
} else if (page) {
  page.removeListener('pageerror', handleError)
  await page.close()
}

This code is different: If browserContent === 'incognito' && context, then page.removeListener, wont be called, but that call should only depend on existance of page.
So we must move the page.removeListener call into its own block, leaving us with this:

if (puppeteerConfig.browserContext === 'incognito' && context) {
  await context.close()
} else if (page) {
  await page.close()
}

Normally this also changes the logic of the original block i posted, but since page and context depend on each other, so when browserContent === 'incognito' && context === undefined (because error in setup), it must be page === undefined, because there cant be a page without context.

To expand on this: You must have knowledge about the dependency between context & page, to correctly understand the minified if/else you propose, which makes it harder to reason about what happens.