I don't recall EULAs, but, you could try installing those apps from the CLI by opening terminology either by finding it in the start menu or pressing the windows key + spacebar or opening the start menu and selecting run everything and then typing terminology
sudo apt install firefox playonlinux
You will see everything as it happens in the terminal and you should be able to get your apps installed.
If the packages are not found when you type the above command, you could also try
sudo apt update
and then try installing again.Go to the full post