How to fully customize single browser (chrome)?

[sandyboxy]

Hello,
I've installed chrome single browser using the following docker-compose.yml file:

version: '3.8'
services:
  chrome:
    ports:
        - '6911:6901' #change 6901 as necessary. eg. '6901:6901', '6902:6901', '6903:6901'
    environment:
        - VNC_PW=<my_password> #change as desired
        - http_proxy=<my_proxy>
        - https_proxy=<my_proxy>
    shm_size: '1gb' #change per your needs. eg. '512m', '1gb', '2gb'
    image: 'kasmweb/chrome:1.15.0' #change the image to your desired image
    volumes:
      - ./kasm-user/:/home/kasm-user

I've mapped browser home directory using a volume to have data persistence and I set proxy with http_proxy and https_proxy variables I found in a dockerfile.

Is there a tutorial to fully customize browser (eg. kiosk mode, etc.) or a list of ENV variables I can use?

FInally, these are the errors I have when I simply start chrome container:

docker-kasmaweb-chrome-chrome-1  | ** (xfdesktop:422): WARNING **: 15:26:43.284: Failed to get system bus: Could not connect: No such file or directory
docker-kasmaweb-chrome-chrome-1  | 
docker-kasmaweb-chrome-chrome-1  | (xfce4-session:77): xfce4-session-WARNING **: 15:26:51.141: Unable to launch "nm-applet" (specified by autostart/nm-applet.desktop): Failed to execute child process “nm-applet” (No such file or directory)
docker-kasmaweb-chrome-chrome-1  | 
docker-kasmaweb-chrome-chrome-1  | (xfce4-session:77): xfce4-session-WARNING **: 15:26:51.145: Unable to launch "system-config-printer-applet" (specified by autostart/print-applet.desktop): Failed to execute child process “system-config-printer-applet” (No such file or directory)
docker-kasmaweb-chrome-chrome-1  | 
docker-kasmaweb-chrome-chrome-1  | ** (xiccd:435): CRITICAL **: 15:26:51.152: Failed to connect to colord: Could not connect: No such file or directory