see firefox when executing robot test in docker
You can use VNC to see what is actually happening over docker. It's like remote access where you can see everything on docker image
Download VNC viewer :
https://www.realvnc.com/en/connect/download/viewer/
Some tutorial :
Article
OR if you don't want VNC
You can take screenshot if you just want an image on a particular place.You can also use driver.getPageSource();
to get the HTML code