Chrome’s Manifest V3 Transition Could End uBlock Origin Support for Many Users

Google Chrome is moving closer to completely ending support for older browser extensions, a change that could significantly impact popular tools such as uBlock Origin. The shift is connected to Google’s transition from the older Manifest V2 extension system to Manifest V3, a newer framework designed to improve security and performance.

The move has already affected some extensions. Since early 2025, several add-ons built on Manifest V2 have faced restrictions, including some widely used ad-blocking tools. While users could previously rely on temporary workarounds to continue running certain extensions, those options are expected to disappear as future Chrome versions enforce the new system more strictly.

A key part of this transition involves Chrome removing the ability to enable older extension support through internal settings. Once the change is fully implemented, users will no longer have an easy way to restore access to Manifest V2-based add-ons. Continuing to run them would likely require advanced developer options and manual adjustments, which could create stability and security concerns.

Google says the reason behind the change is not specifically to target ad blockers but to modernize the extension platform. Manifest V3 was introduced to limit the amount of control extensions have over browser activity, reducing the chances of malicious add-ons abusing permissions or accessing sensitive information.

There is a valid security argument behind the update. Over the years, some browser extensions have been found to collect user data, inject unwanted content, or perform actions beyond what users expected. A stricter extension model could help prevent those problems by restricting how add-ons interact with websites and browser processes.

However, the same restrictions also affect privacy-focused tools. Many ad blockers depend on deeper access to browser requests in order to filter unwanted content effectively. Under Manifest V3, some of those capabilities are limited, meaning certain extensions may need to change how they work or offer fewer features.

Developers can update their extensions to support the newer system, but compatibility does not always mean identical functionality. Some tools may continue operating while losing advanced features that made them popular in the first place.

For users who depend on ad blocking, this transition may require choosing a different solution. Some versions of existing blockers are being redesigned specifically for Manifest V3, offering continued compatibility while accepting certain limitations compared with older releases.

The long-term impact of Chrome’s extension changes remains unclear. While the update may create a safer environment for browser users, it also changes the balance between security controls and user choice, especially for people who rely on advanced privacy tools.

Google Chrome is moving closer to completely ending support for older browser extensions, a change that could significantly impact popular tools such as uBlock Origin. The shift is connected to Google’s transition from the older Manifest V2 extension system to Manifest V3, a newer framework designed to improve security and performance.

The move has already affected some extensions. Since early 2025, several add-ons built on Manifest V2 have faced restrictions, including some widely used ad-blocking tools. While users could previously rely on temporary workarounds to continue running certain extensions, those options are expected to disappear as future Chrome versions enforce the new system more strictly.

A key part of this transition involves Chrome removing the ability to enable older extension support through internal settings. Once the change is fully implemented, users will no longer have an easy way to restore access to Manifest V2-based add-ons. Continuing to run them would likely require advanced developer options and manual adjustments, which could create stability and security concerns.

Google says the reason behind the change is not specifically to target ad blockers but to modernize the extension platform. Manifest V3 was introduced to limit the amount of control extensions have over browser activity, reducing the chances of malicious add-ons abusing permissions or accessing sensitive information.

There is a valid security argument behind the update. Over the years, some browser extensions have been found to collect user data, inject unwanted content, or perform actions beyond what users expected. A stricter extension model could help prevent those problems by restricting how add-ons interact with websites and browser processes.

However, the same restrictions also affect privacy-focused tools. Many ad blockers depend on deeper access to browser requests in order to filter unwanted content effectively. Under Manifest V3, some of those capabilities are limited, meaning certain extensions may need to change how they work or offer fewer features.

Developers can update their extensions to support the newer system, but compatibility does not always mean identical functionality. Some tools may continue operating while losing advanced features that made them popular in the first place.

For users who depend on ad blocking, this transition may require choosing a different solution. Some versions of existing blockers are being redesigned specifically for Manifest V3, offering continued compatibility while accepting certain limitations compared with older releases.

The long-term impact of Chrome’s extension changes remains unclear. While the update may create a safer environment for browser users, it also changes the balance between security controls and user choice, especially for people who rely on advanced privacy tools.