Google has announced a deadline extension to remove support for Manifest V2 extensions in the company’s Chrome browser and open-source Chromium kernel.
The change does not affect the main decision to remove support for Manifest V2 extensions in favor of Manifest V3. Initially dubbed the ad blocker killer, due to limitations on content blocking and other types of browser extensions, Google has made concessions that allow content blockers to run on Chrome once the final change made.
Extensions are still limited compared to Manifest V2, especially if multiple that use filter functionality are running concurrently, or if many filters are enabled in a single extension.
Chromium browser developers have two main options to deal with these limitations. First, they may have or introduce their own content blockers, which may continue to work even after the change. Second, they can continue to support Manifest V2, or at least the required APIs.
Brave, Vivaldi or Opera already use their own content blockers. Vivaldi, for example, has confirmed that its ad blocker will continue to work.
Mozilla, maker of Firefox, plans to support Manifest V2 and V3 in the browser to ensure Manifest V2 extensions continue to be supported in the browser.
Google’s original plan was to stop supporting Manifest V2 extensions in Chrome by June 2023. For most users, support would end in January 2023, but a company policy would allow users to extend the six-month period.
Manifest V2 Retirement: Blueprint Changes
Now, Google has announced an extension to 2024 in a new blog post on the Chrome Developer site and details on phasing out support for Manifest V2 in the browser.
- In January 2023, when Chrome 112 is released, Google plans to conduct experiments to disable support for Manifest V2 in development browsers (Chrome Beta, Dev, and Canary).
- In June 2023, when Chrome 115 is released, Google plans to experiment to disable support for Manifest V2 extensions for all Chrome channels, including Stable.
Corporate policies can be set to extend the retirement deadline to January 2024. Chrome developers who maintain Manifest V2 extensions in the Store will have badges removed from extensions by January 2023. From June 2023 , Manifest V2 extensions are no longer allowed to be published with public visibility. All existing Chrome extensions that rely on Manifest V2 will be replaced with unlisted.
The delay buys developers more time, especially since several APIs don’t appear to be ready at the time of writing. Google has created a “known issues” page for developers that lists major known migration issues.
For users, this means they don’t have to worry about extensions missing support until January 2024, provided they enforce company policy to extend the deadline, or do so. apply by the manufacturer of a Chromium-based browser.
Now you: are you affected by the migration to Manifest V3?