Google Chrome has reportedly been installing a 4GB AI model, Gemini Nano, onto users' devices without explicit consent or notification. Computer scientist Alexander Hanff discovered that this on-device AI, which performs tasks like scam detection and text summarization, is downloaded when a device meets specific hardware requirements. While Google states the model automatically uninstalls on less capable devices and that users can disable it in Chrome settings since February, Hanff claims users are unaware of its presence unless they actively search for a specific folder. Hanff suggests this move could be an attempt by Google to reduce server costs and raises concerns about potential violations of European data privacy regulations.