Question Plugin in Roundcube

[CobraArbok]

Server operating system version

Ubuntu 20.04.5 LTS

Plesk version and microupdate number

18.0.46

I am setting up Roundcube and I need a little help.

1. I see that there are already installed plugins and that just list them in the config.php. How can I change the configuration without losing the change at the next update? And to have different configurations for each user?
2. To install new extensions I should use the composer; it's already present? Where is it? If not, how do I install it?
3. I have installed the Mailvelope extension in Chrome, but in Encryption I keep seeing the notification that it is not activated.

Thanks in advance for the help.

 

[Kaspar]

1. You can download Roundcube plugins via SSH and extract any achieves to the plugin directory of Roundcube. After that you add the plugin to the $config['plugins'] array in the config.inc.php file. The config file won't be affected by Plesk updates.

2. Which extensions? Or do you mean Roundcube plugins? No need for composer to install Roundcube plugins.