[qilo]

It's not working for me anymore, after upgrade to 139.

chrome://policy/ shows policy status error:

  Policy name                        Policy value    Source      Applies to    Level        Status

  ExtensionManifestV2Availability    2               Platform    Machine       Mandatory    Error
                            Value    2
                            Error    Unknown policy.

Update: Add these options to the chrome executable to make it work again:

  --enable-features=AllowLegacyMV2Extensions,UnexpireFlagsM136,UnexpireFlagsM137 --disable-features=ExtensionManifestV2Unsupported

Actually, these are enough:

  --enable-features=AllowLegacyMV2Extensions --disable-features=ExtensionManifestV2Unsupported