Run in a console on the track package page of an Amazon order and you'll get a new localStorage entry each time it's run to track progress through the day.

amazonProgress.js

(function getProgress() {
  if (!localStorage.amazonProgress)
    localStorage.amazonProgress = "[]"

  const store = JSON.parse(localStorage.amazonProgress)
  store.push({
    time: Date.now(),
    progress: JSON.parse(document.querySelector("script[type=\"a-state\"]").innerText).progressTracker.lastTransitionPercentComplete

  })

  localStorage.amazonProgress = JSON.stringify(store)

  return store
  
})()

If we can work out a pattern, we could return a status of sorts:

switch(progress) {
    case 90:
        status = 'You\'re package should be arriving soon';
        break;
}

Something like that anyway.