I am having a hard time installing the Chromium Browser. Do I have to have Ubuntu fully installed to the hard drive to be able to do this? For the time being, I am booting from USB.
Short answer: Yes you can install apps to the bootable usb.
Long answer: Installing applications require enough space for the programs to run, so if you have Ubuntu on a small bootable usb then it may not have enough space to install. Also any apps that you install to the bootable drive will be deleted as soon as you shutdown or reboot the computer. You may also need to download new updates even with a fresh install of ubuntu with "sudo apt-get upgrade"
The bootable live or "try" ubuntu is NOT ment for daily use