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New California Law Could Change the Way All Americans Browse the Internet

Assembly Bill 566 mandates web browsers to offer a data opt-out signal by 2027, aiming to simplify user privacy controls and influence national internet data standards.

  • In California, lawmakers passed AB 566 requiring browser makers to offer an opt-out `signal` by 2025, with Google’s Chrome and Microsoft’s Edge mandated to comply, California law shows.
  • California already enshrines opt-out rights under the California Consumer Privacy Act, and California Governor Gavin Newsom vetoed a more expansive bill in 2024 while the California Privacy Protection Agency sponsored AB 566 after prior attempts.
  • The new tool will give consumers a single toggle to automate opt-outs, with experts saying implementation is simple and Mozilla’s Firefox already offers a `tell websites not to sell or share your data` setting, and the law does not mandate a specific standard.
  • Passage of the bill faced resistance, as CalMatters reporting found opposition organized behind the scenes and spokespeople for Google and Microsoft declined to comment.
  • Experts warn the changes could set a de facto national standard, but some websites may geolocate and honor the signal only for users from mandating states, while privacy advocates plan to expand preferences.
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Cal Matters broke the news in Sacramento, United States on Wednesday, November 5, 2025.
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