Hi,
It seems something changed on M63 causing Chrome to consider some non-CWS as corrupted (chrome://extensions show the "This extension may have been corrupted." message).
There are more cases here:
I can confirm this problem was really introduced in M63, and adding the "update_url" to the extension manifest fixes the problem.
This doesn't seem to affect CWS extensions. My guess here is that CWS adds / overwrites the "update_url" field in the manifest when packaging the extension.
Can somebody confirm that Chrome is more stringent with the extension manifests on M63? Or is it a bug?
Cheers,
Gustavo