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Definitive update for Manifest V3 will end support for extensions like uBlock Origin and AdBlock, changing how users control advertising and tracking on the internet.
Users of Google Chrome and other Chromium-based browsers will face one of the biggest changes in recent years in the extension ecosystem. The advancement of the implementation of Manifest V3, a new platform for extensions developed by Google, is reaching its final phase and will mark the definitive end of support for Manifest V2, technology used by some of the most popular ad blockers on the internet.
In practice, the change will directly affect tools widely used by millions of people worldwide, including extensions like uBlock Origin and AdBlock. With the complete removal of support for Manifest V2, these solutions will cease to function in the latest versions of the browser.
The decision is part of a process initiated several years ago by Google, which argues that the update brings improvements in security, performance, and management of permissions for extensions installed by users.
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What is Manifest V3 and why is it causing controversy?
The Manifest is a set of rules and specifications that define how extensions work within the browser.
Manifest V2, used for over a decade, allowed the emergence of various advanced extensions, including ad blockers capable of filtering content in real-time before it was loaded on pages.
Manifest V3 introduces new technical limitations that profoundly alter this functionality. According to Google, the changes are designed to increase user security, reduce risks related to malicious code, and improve browser efficiency.
However, extension developers and privacy experts claim that the new rules significantly reduce the ability to block ads and trackers, making some tools less effective.
This discussion has accompanied the project since the first announcements of the migration to Manifest V3 and continues to be a topic of debate within the tech community.
Chromium code already considers Manifest V2 obsolete
Recent signs found in Chromium development indicate that the transition process has entered its final phase.
Development documents point out that Manifest V2 has started to be treated internally as “dead code,” a term used to identify technologies that no longer receive active support and will be permanently removed.
In a statement, the team responsible for Chromium reported that extensions based on the old model will no longer be allowed in supported versions of the browser.
According to the developers, the continuous maintenance of Manifest V2 has become unfeasible due to the technical complexity accumulated over the years, as well as issues related to security and compatibility with new platform features.
Date for the end of ad blockers has already been set
The schedule released by the developers establishes specific dates for the definitive removal of support for Manifest V2.
The first stage will occur on June 30, 2026, with the release of version 150 of Google Chrome.
In this update, the feature called “ExtensionManifestV2Disabled” will be removed, a mechanism that still allowed the execution of certain old extensions.
Although a temporary alternative will initially remain available, it will require manual reactivation every time the browser is opened, making its use impractical for most users.
The permanent removal will happen shortly thereafter, with the arrival of Google Chrome 151, scheduled for July 2026.
In this version, various compatibility features that still maintained some connection with Manifest V2 will be eliminated, definitively ending the execution of extensions developed under the old standard.
Change also affects Edge, Opera, and other browsers
Many users believed they could avoid the restrictions by migrating to alternative browsers based on Chromium, but the situation is more complex.
Since Chromium serves as the base for various modern browsers, including Microsoft Edge and Opera, the changes end up impacting practically the entire ecosystem.
The Opera extensions team itself informed developers that support for Manifest V2 will be removed along with Chromium updates.
For this reason, extensions that are not adapted to the new standard will cease to function not only in Chrome but also in various browsers that share the same technological architecture.
This increases the pressure on developers to update their products before the definitive withdrawal of support.
What will be the impacts for users?
The main impact will be felt by users who rely on traditional ad blockers to improve internet browsing.
In addition to eliminating invasive advertising, many of these tools are also used to block trackers, monitoring scripts, and other elements that affect digital privacy.
With the mandatory migration to Manifest V3, some of these functionalities may be reduced or work differently.
Some developers have already released versions compatible with the new standard, but experts claim that certain capabilities present in Manifest V2 cannot be fully reproduced due to the limitations imposed by the new architecture.
On the other hand, Google argues that Manifest V3 offers important benefits, including greater control over permissions, reduced system resource consumption, and additional protection against malicious extensions.
With information from the site Tudo Celular
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