You have to launch Chrome with this command-line argument:
–disable-features=ExtensionManifestV2Unsupported,ExtensionManifestV2Disabled
And then, I think you have to re-enable it with config flags as well:
chrome://flags/#extension-manifest-v2-deprecation-warning [Disabled] chrome://flags/#extension-manifest-v2-deprecation-disabled [Disabled] chrome://flags/#extension-manifest-v2-deprecation-unsupported [Disabled] chrome://flags/#allow-legacy-mv2-extensions [Enabled]
I have not tried this personally, though.