Post Description

ChromeEnableManifest


Chrome 138 has just been officially released. Having previously written “How to Force Install the World’s Best Ad Blocker uBlock Origin on Chrome”, I decided to investigate ways to keep Manifest V2 support in Chrome. Chrome 138 is the last version to fully support Manifest V2. Starting with version 139, Manifest V2 will be disabled by default. However, there are still methods to keep it enabled in versions 139 and 140.

1 Use Chrome Enterprise Policy to Extend Manifest V2 Support
Starting from Chrome 128, the notification “This extension is no longer supported” will appear upon the first launch after an update. You need to re-enable the extension in the “Extensions” menu to use it. If you want to prevent this notification and stop Manifest V2 extensions from being automatically disabled, you can use a Chrome Enterprise Policy.

1.1 Windows
Choose one of the following two methods:

Method 1: Use the Command Line

Execute the following commands, then open chrome://policy in Chrome and click the “Reload policies” button.


reg.exe add "HKLM\SOFTWARE\Policies\Google\Chrome" /v ExtensionManifestV2Availability /t REG_DWORD /d 2 /f
reg.exe query "HKLM\SOFTWARE\Policies\Google\Chrome" /v ExtensionManifestV2Availability
Method 2: Import a Registry File

Save the following content as ExtensionManifestV2Availability.reg, then double-click the file to import it into the registry. Afterward, open chrome://policy in Chrome and click the “Reload policies” button.


Windows Registry Editor Version 5.00
[hkey_local_machine\software\policies\google\chrome]
“ExtensionManifestV2Availability”=dword:00000002