Google Chrome is alerting users that their ad blockers might be turned off soon.

Google Chrome has started notifying users that ad blockers based on the Manifest V2 framework will soon be disabled. This change is due to Chrome’s transition to Manifest V3, which renders Manifest V2 extensions, including popular ad blockers like uBlock Origin, obsolete.

Google announced last year that it would phase out Manifest V2 in favor of Manifest V3, which aims to enhance user experience. Since June 3, Chrome has been displaying warnings for all Manifest V2 extensions, indicating they will stop functioning on stable, dev, and Canary versions of the browser. This warning, now appearing on Chrome 127, affects ad blockers that rely on the outdated V2 framework.

Raymond Hill, the lead developer of uBlock Origin, explained that the extension depends on Manifest V2 definitions, prompting Chrome’s warning. Users are advised to switch to alternatives like uBlock Origin Lite, Ghostery, or Adblock Plus, though these may lack some features of the original extensions. uBlock Origin Lite, designed to comply with Manifest V3, might not offer the same per-URL filtering and other functionalities.

Though it’s not advisable to ignore Google’s warnings, users can temporarily continue using older V2 extensions, but this option will soon be removed. By early next year, only Manifest V3 extensions will be supported.

To accommodate businesses, Google will allow enterprise users to continue using Manifest V2 until June 2025. For those relying on ad blockers, the lite versions may recover some features as Manifest V3 becomes the new standard. Alternatively, users can switch to browsers like Firefox, which has no immediate plans to phase out V2 extensions.