If you want to stick to Chromium, an official Registry hack exists that allows extending the support for MV2 add-ons with the help of the "ExtensionManifestV2Availability" policy that is designed for enterprises.
Enabling the policy allows an extended year of support for MV2 add-ons till June 2025. The policy works on Windows, as well as macOS, and Linux. Chrome version 110 or newer is needed, while for Edge, it is version 123 or later.
Reddit user
TeamDJ brought attention to the policy that can be added inside the Windows Registry using the Registry Editor app (Regedit) as a DWORD. They wrote:
- Open up the “Registry Editor” Program
- Navigate to: Computer\HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Google\Chrome
- With the Chrome folder on the left highlighted, select Edit/New/DWORD (32-Bit Value)
or, if you prefer, on the right side of the screen in a BLANK SPOT, you can RIGHT CLICK New/DWORD (32-Bit Value).
- Name it ExtensionManifestV2Availability and hit enter.
- Right click what you just created (ExtensionManifestV2Availability) and click Modify. Set the Hexadecimal value to 2, and click OK.
- You’re done, but check your work by opening Chrome, and pasting chrome://policy in the URL Address bar and hit enter. You should see the ExtensionManifestV2Availability policy, and the value should be set to 2. If you don’t see it, click “Reload Policies” and/or review your work.