Web browsers must include a setting that tells websites not to sell or share user data
Companies that make web browsers must include an easy-to-find setting that sends an opt-out preference signal, telling businesses not to sell or share the user's personal information, and must explain how it works. Browser makers aren't liable for privacy violations by businesses receiving it.
Who it affects
Companies that make web browsers, and people who use them
When
This law took effect on January 1, 2026, but the changes described here start on January 1, 2027.
- : Signed into law
- : Law took effect
- : The changes described here start to apply
Official text
California AB 566: California Consumer Privacy Act of 2018: opt-out preference signal.
On California Legislative Information. The official text is what counts; read it before you act.
Not legal advice. Plain-English summaries to help you find what changes and when. Not legal advice: read the official text, and ask a lawyer about your situation.