Joy Linehan

On May 4th, a Swedish privacy lawyer caught Google Chrome silently installing a 4 GB AI model on every desktop computer it could reach. If you delete the file, Chrome treats the deletion as a temporary error and downloads it again at the next opportunity. The file is called weights.bin. It lives in a folder called OptGuideOnDeviceModel inside the Chrome user profile directory. It is the weights for Gemini Nano, Google's on-device large language model. Hundreds of millions of devices now carry it. Two thirds of every desktop browser in the world is Chrome. Alexander Hanff, the Swedish privacy lawyer, installed a clean copy of Chrome on a fresh Mac, ran a script that visited a hundred webpages with no human input, and watched the system logs as Chrome silently wrote 4 GB to his disk. Chrome 147 ships with an "AI Mode" pill rendered in the address bar. A reasonable user, knowing Chrome just installed an on-device AI model, would assume that visible AI Mode feature uses the model sitting on their hard drive. Local query. Local processing. Local privacy. Every part of that assumption is wrong. The visible AI feature ships your queries to Google's servers. The 4 GB file on your hard drive does nothing visible. It powers obscure features buried in right-click menus that almost no Chrome user has ever clicked. The invisible binary sits on your disk and waits for the version that does. Chrome is the most-installed surveillance product of all time. Two billion users. Every URL you visit, every search you type, every form you fill out, every site you stay on, every site you leave. The advertising model that pays for Chrome requires every one of those signals. Chrome holds 64% of the global desktop browser market. Two-thirds of every reader of this sentence is reading it through software that just took 4 GB of their hard drive without asking. Until last year, Chrome's surveillance ended at what you typed into the address bar and what your activity log showed. The model can now read the page you have open, the text you have selected, the draft you are writing inside a Gmail tab before you have decided whether to send it. Google's "Help me write" feature requires that capability by definition. Help me write means read what I am writing. Locally. In real time. Pre-send. It's time to switch browsers. The cartel cannot watch the screen it is not running on.