Smart choice using Groq's free tier with LLaMA 3 - the speed is hard to beat for real-time summarization. Using Mozilla Readability for extraction is solid too, it handles messy article HTML surprisingly well. Curious - how do you handle pages where Readability fails to extract cleanly, like single-page apps or paywalled content? Also, DOMPurify for sanitization is a nice touch for security. 36 customization combos is a lot of flexibility without overcomplicating the UX.