Google has made a major update to the Chrome browser by integrating an AI chatbot named Gemini into the address bar. Users can simply type '@gemini' followed by their query in the address bar to receive a response from Gemini. This integration makes AI a default part of the browsing experience for Chrome's vast user base, eliminating the need for extra navigation. Gemini uses a lightweight version of Google's advanced language model family, Gemini 1.5 Flash, offering significantly improved AI capabilities over its predecessor.