Microsoft Edge is about to lock out older ad blockers, just like Chrome did

Microsoft Edge is moving to end support for Manifest V2 extensions, effectively disabling older ad-blocking software that relies on that framework. This transition aligns the browser's extension architecture with the newer Manifest V3 standard, a shift previously initiated by Google Chrome. Technological alignment appears to be the primary driver behind this move. The Windows Blog positions this transition as a way to move the extension ecosystem forward, citing performance and security as the motivation.

The change follows the specific trajectory established by Chrome, which has already begun similar efforts to deprecate older extension protocols. Reporting from outlets like The Verge and Neowin notes that the discontinuation will specifically impact tools such as uBlock Origin. While the industry consensus identifies a firm timeline for the phase-out—noted by PiunikaWeb and Thurrott.com as occurring by the end of 2026—coverage does not yet specify a granular, phased rollout schedule for individual regions or user groups. Some sources emphasize the total loss of functionality for legacy add-ons, whereas others focus on the transition toward the mandatory V3 architecture.

Coverage does not yet specify whether Microsoft will offer temporary exemptions or transition periods for enterprise users who may rely on specific V2-based extensions. Additionally, the exact date when the browser will cease all V2 capability is not universally defined beyond the end-of-year window. The extent of available workarounds for users of affected ad blockers remains unconfirmed by official documentation.