If you use Chrome, there are 4GB of an AI model sitting on your machine that you never asked for. And it is not the first time Google does this, it is the third. Privacy researcher Alexander Hanff published the report on May 4, 2026. The file is called weights.bin , lives in OptGuideOnDeviceModel inside the Chrome user data directory, and it is the Gemini Nano model. No prompt, no checkbox. Find it and delete it, and Chrome re-downloads it on the next restart. The first reaction here was déjà vu, not surprise. In December 2020, Loren Brichter (@lorenb on X, the guy behind "pull to refresh" and Tweetie , the client Twitter bought in 2010 to become its official iPhone app) published chromeisbad.com , a one-page site explaining how Keystone, Google Chrome's updater on Mac, kept running in the background, dragging the system down even when Chrome was closed.…