Microsoft announced on Friday (07) that the Edge browser will begin the process of disabling extensions built under the Manifest V2 standard. This change will directly impact users of traditional ad blockers, such as uBlock Origin.
This change follows a trend already established by Google Chrome. The transition will be implemented gradually throughout 2026, starting with the browser's test versions before being applied to the stable edition. The company justifies this migration by the need to centralize the extension ecosystem on the Manifest V3 platform.
In practice, those who use legacy extensions in Edge may face the loss of functionality of these add-ons. Users of affected ad blockers will have three options: update to Manifest V3 compatible versions, such as uBlock Origin Lite; opt for another already adapted blocker; or switch to a browser that still supports Manifest V2 extensions.
Microsoft notified that Manifest V2-based extensions will be progressively disabled by default starting this month. Before this rule is implemented, users will receive alerts and suggestions for equivalent versions available in the new format.
According to the company, the volume of old extensions with relevant usage in the Edge add-on store is limited. It was reported that there are 58 extensions with significant usage that still depend on Manifest V2, and only three of them do not have versions available in the latest standard.
The main consequence will be felt by users of the traditional version of uBlock Origin, since this blocker depends on the technology that will be discontinued by the browser. As a solution, Microsoft suggests adopting uBlock Origin Lite, designed to operate within the restrictions of Manifest V3.
For those who prefer to keep using old extensions, there is the alternative of migrating to browsers that maintain support for Manifest V2. Opera, for example, has expressed an intention to preserve this compatibility as long as it is technically feasible, as does Firefox, which also emerges as an option for users of the older model.
Microsoft plans to finalize the adaptation of regular Edge users by the end of 2026. In managed corporate environments, the removal of support should occur later, scheduled for early 2027.

