Manage Extension administration and recover account

We are trying to publish a new version of Extension Adobe Target VEC Helper:

Unfortunately, after an Organization change we lost the credentials for the account used to initially publish this extension.
Is there any way to recover the Mozilla account so we can continue publish new versions of this extension?
Is there any way to provide a group access to manage the extension to some more users to avoid in the future similar cases with loosing account credentials?

Best regards,
Sorin Amza.