Chrome 148 Downloaded 4GB of AI Data Without Asking – Here’s How to Stop It

If you noticed your internet data or disk space suddenly vanishing a few weeks ago, you weren’t alone. Chrome users around the world discovered that version 148 of the browser had silently downloaded roughly 4GB of AI-related data in the background—with no pop-up, no explanation, and no obvious way to stop it. The backlash was immediate, and Google has since issued a statement explaining what happened.

What Happened

Shortly after Chrome 148 rolled out, users began reporting unexpected bandwidth usage and storage bloat. Investigations traced the culprit to a new AI model bundled into the browser. According to reports from Gizchina and other outlets, Google confirmed that the download is part of an on-device AI feature set—something designed to power functions like smart text selection, image description, and other local machine learning tasks.

Google’s official explanation states that the model is intended to run entirely on your device. No data leaves your computer, and the AI processing happens locally. However, the lack of upfront disclosure angered many users, especially those with capped data plans or limited SSD space. The download appears to be enabled by default, and many people were never given a choice.

Why It Matters

From a privacy standpoint, Google’s claim that the model operates locally is reassuring. On-device AI means your content doesn’t need to be sent to a remote server for analysis. Still, the incident raises several concerns:

  • Unexpected data usage: 4GB is a meaningful download, particularly for mobile hotspot users or anyone on a metered connection.
  • Storage impact: On a 128GB laptop, that’s about 3% of total space consumed without consent.
  • Limited transparency: The silent nature of the download undermines trust. Users should be able to know what their browser is fetching and why.

There is also the broader question of how much control users have over browser-integrated AI. If Google can push a 4GB model now, what might future updates bring? The lack of an easy opt-out mechanism (or any warning) is a legitimate grievance.

What You Can Do

You can check whether the AI model has been downloaded on your system and disable future downloads. Here’s how:

  1. Open Chrome settings. Click the three-dot menu in the top-right corner and select Settings.
  2. Navigate to AI settings. Scroll down to the AI section (or type chrome://settings/ai into the address bar and press Enter).
  3. Disable on-device AI features. You’ll see toggles for features like “Smart text selection” or “On-device AI model.” Turn each off.
  4. Clear the downloaded model (optional). If you want to reclaim storage, go to chrome://settings/clearBrowserData and choose “Cached images and files.” This will delete the model, but it may return if you leave the AI features enabled.

To prevent future silent downloads, make sure the toggle for automatic model downloads is turned off. If the option is not visible, check under Privacy and security > Site settings > Additional permissions for anything related to “AI model download.”

Keep in mind that disabling these features means you won’t get the local AI capabilities. For many people that’s a fair trade-off for control and transparency.

What This Means Going Forward

Google has said it will improve communication around such updates in the future. Whether that actually happens remains to be seen. For now, the takeaway is simple: treat browser updates as you would any software installation—review what’s new, and don’t assume everything is benign. If you’re concerned about privacy or data usage, check your Chrome settings after major updates.

The incident is a reminder that even well-intentioned features can become privacy headaches when rolled out without user consent. On-device AI has genuine benefits, but they should come with clear options—not a 4GB surprise.

Sources

  • Gizchina, “Google Explains Chrome 148 Privacy Concerns as Users Discover Silent 4GB AI Download,” May 11, 2026.
    (Covers the discovery, Google’s response, and initial user reactions.)
  • Google Chrome Help documentation on AI settings (official support pages as of Chrome 148).