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Chrome Auto-Downloads 4GB Gemini AI Model Without Consent

5/10/2026

Summary

Chrome Silently Downloads

Google Chrome silently downloads a 4GB Gemini Nano on-device AI model onto users' computers in the United States.
The model, stored as a file named weights.bin in an OptGuideOnDeviceModel folder, is installed without any opt-in prompt.
Chrome uses the model for AI-powered tasks such as text rephrasing, scam detection, web-page summarization, and tab organization.
Disabling the “On-device AI” setting in chrome://settings/system does not delete the file; the model must be blocked via the “optimization guide on device” flag in chrome://flags.
If the file is deleted, Chrome automatically re-downloads it unless the flag is set to “disabled” and the browser is restarted.
Researchers estimate that deploying the 4GB model to hundreds of millions of users could consume hundreds of gigawatt-hours of energy, emitting tens of thousands of tons of CO2.
The silent download raises privacy, legal, financial (especially for metered connections), and antitrust concerns as regulators examine Big Tech’s default-on features.

Summary

Chrome Sparks Backlash

Users on Reddit and X called Chrome’s silent AI model install malware and said they will leave Chrome.
Mozilla pledged a kill-switch that will turn off all new AI features in Firefox until users opt-in.
European Union data-protection authorities opened a formal inquiry into whether Chrome’s automatic model download breaches the GDPR.
Analysts warned the uproar may shift users toward Firefox and Vivaldi, eroding Chrome’s market lead.

Summary

Google Deploys Gemini

Google told Ars Technica that Gemini Nano installs only when hardware, account features, and site visits using Google’s on-device Gemini API meet criteria.
Chrome now supports split-screen Gemini chatbot and automated browsing as part of its on-device AI features.
Google says the on-device AI mechanism and the 4 GB Gemini Nano model have not changed despite storage usage, although analysts note the sparse explanation fuels confusion about deployment.

Summary

Chrome Disables Gemini

A poll of 92 votes showed 7 % want to keep Gemini Nano, 79 % would wait, and 14 % plan to delete it immediately.
The February rollout added a Chrome Settings toggle that disables on-device AI and removes the weights.bin file, though many users cannot see the toggle.
Users can disable Gemini Nano via chrome://flags, delete the OptGuideOnDeviceModel folder, and may need to repeat the steps after future Chrome updates.

History

Historical Context

In 2004 the European Commission fined Microsoft €497 million for bundling Windows Media Player with Windows, a precedent that shaped EU scrutiny of default software. Decades of similar rulings—including a €899 million penalty in 2008—have made the Commission vigilant about bundled features. Google Chrome’s inclusion of the 4 GB Gemini Nano model now triggers fresh EU inquiries.

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Chrome Silently Downloads

Google Chrome silently downloads a 4GB Gemini Nano on-device AI model onto users' computers in the United States.
The model, stored as a file named weights.bin in an OptGuideOnDeviceModel folder, is installed without any opt-in prompt.
Chrome uses the model for AI-powered tasks such as text rephrasing, scam detection, web-page summarization, and tab organization.
Disabling the “On-device AI” setting in chrome://settings/system does not delete the file; the model must be blocked via the “optimization guide on device” flag in chrome://flags.
If the file is deleted, Chrome automatically re-downloads it unless the flag is set to “disabled” and the browser is restarted.
Researchers estimate that deploying the 4GB model to hundreds of millions of users could consume hundreds of gigawatt-hours of energy, emitting tens of thousands of tons of CO2.
The silent download raises privacy, legal, financial (especially for metered connections), and antitrust concerns as regulators examine Big Tech’s default-on features.

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