Ubuntu-mate-core install

Hello
I want to install mate desktop on Ubuntu running on Docker container. However
apt-get install -y --no-install-recommends ubuntu-mate-core ^
When it installs with, extra software such as FIrefox will be installed. I want a desktop that doesn't have extra software like Raspbian Stretch with desktop. Is that possible?
Finally, since this sentence is translated by Google translation, there may be inconvenient sentences.
Thank you.

To get correct result you should use tasksel:

sudo apt-get install tasksel
sudo tasksel install ubuntu-mate-core

- see this thread for reference.