At this point, the default is to allow all comments if the module has comments (in icms_version.php). Probably since the base assumption is that ImpressCMS and predecessor were community sites and that would be the most common choice.

Also, all notifications defined in icms_version.php will be enabled by default.

Neither of these are reading anything from the module at the time of install.

However - you could override those options after the module is installed with the install function for the module, which is called at the very end of the process.

How do i disable comments and notifications as default setting of a module preferences

and also set default permission of module when installing the module

is this possible? any example i can refer to ?