Introducing LightUp - AI-Powered annotations for every page on the web. LightUp is an experimental extension that lets you stay focused, get instant explanations, and expand your understanding—all in one click. The beta is live and open-sourced, your input will shape its future. It's designed to make understanding and interacting with web content effortless. Whether you're an engineer frustrated with switching tabs while reading a document, or a student who breaks focus searching for definitions, LightUp answers your questions with just one click. With today’s LLMs like Llama 3.2 1B and 3B, optimized for on-device performance, you can choose to run LightUp offline using your own local LLM, ensuring enhanced security and privacy By open-sourcing it, I hope to make it more useful.