I want to boot Firefox from cron in a CentOS virtual desktop environment

I'd like to launch Firefox from cron in a CentOS 6.8 virtual desktop environment, but I'm not sure if it's successful, so please let me know.

First of all, the cron itself is working well, and when I registered the command to create the file as a trial, it was working.

So I registered the command to open Firefox, but Firefox doesn't start up on the desktop even when it's running time.

On the console, run the following command to open the browser:

firefox-p kaikaimon-url https://example.com

If you set cron to the following, the browser will not open.

3022**firefox-p kaikaimon-url https://example.com

Does this mean that the browser is open behind the scenes?

As far as the log shows, it appears to be working.
I would appreciate it if you could let me know.