Q Light Controller+

I've installed the RPi QLC+ image from Massimo on my RPi 4 8GB.
It's been awhile since i worked with a unix system. So i have a few questions:

One of the most important things:
1: Is a web browser installed? Which one and how do i start it?
2: If not, how do i install Firefox?

I am going to use QLC+ for my escape room together with Node-Red.
3: How do i install Node-Red on this image?

4: If i run QLC+ using the script: qlcplus-start.sh i can't start anything else. I get the prompt back when i close QLC+. How do i fix this?

That's all for now.
Thanks for your time!

Kind Regards,
Guus

No, there is no web browser and there is no window manager.
If you want to use your RPi as a PC (which is not btw) you need to use a vanilla image from the Raspberry Pi website and install QLC+ manually with the deb package.
Instructions in the PDF provided.