Microsoft is bringing Chrome’s uBlock Origin problem to Edge.
In the recent announcement, Microsoft described the end of the technology known as Manifest V2 from the previous versions of Edge browsers. Starting from August 2023, the old extensions built using Manifest V2 will be disabled by default. The technology will end completely by the end of 2026.
This situation with Manifest V2 can lead to the disappearance of the traditional version of uBlock Origin which is not affected by Manifest V3. Manifest V3 limits the number of filtering rules to 30000 items and removes the network access that ad blockers require to track and deny advertisements before they are loaded. The author of the original uBlock Origin called the implementation of Manifest V3 a crime against the ad blocking industry.
Microsoft attempts to present it as an improvement from the viewpoint of security. However, EFF claims MV3 to be a backdoor in favor of advertisement companies. Chrome had a similar experience in 2025 and Microsoft is simply following the path of Chromium technologies.
As a result of this, two of the largest web browsers in the world are now discontinuing the feature that uses technology to prevent tracking from occurring, rather than merely blocking ads. Firefox and Brave, however, are not embracing this trend. It's good to be aware of it before your own add-ons are discarded without warning.