Popup lets you ask inline follow-up questions without leaving the page. Normally, asking follow-up questions in ChatGPT pushes what you were reading off screen, and you have to scroll back to find the original place. Popup opens a mini ChatGPT window on the page so you can ask the question without losing the place. All questions asked through Popup are preserved across page reloads. No API key or login required. Popup works on the existing ChatGPT page as a reformatting layer, sending questions to ChatGPT without being noticeable on the page.