Do I have to do a full Install of Firefox to get the newest version?
1. In your terminal type:
sudo apt-get update
This will update your package lists so you can get the most recent version of Mozilla Firefox available in the repos.
2. In your terminal type:
sudo apt-get install firefox
This will download and install the most recent version of Mozilla Firefox listed in your package list, unless it is already installed.
3. (Optional) In your terminal type:
sudo apt-get clean
This will clean APT's cache. When you run a command like "sudo apt-get install firefox" firefox and any dependencies that need to be
downloaded get saved to APT's cache folder, but the system doesn't automatically delete them. Since you're running a liveUSB presumably
with persistence you probably don't want to keep those cached files, because it's more data being saved to the persistence file/partition.
I'm curious about this from a security standpoint, and am not sure why it is not suggested by all these sites that say to use LiveDVD's for Bank Transactions?
Running from a frugal environment (eg: a live-DVD)
is often recommended by people because it helps ensure you are using an uncompromised (eg: not infected with malware, or hacked)
OS, and because data from the session is only written to memory, it is physically erased when you reboot, so there are no traces of your activity for someone examining your computer to find. Please note, that by using a persistence file/partition, or by having an in-use swap partition, you potentially lose these advantages. Most people just use their regular OS, delete their browser cookies, clear their passwords, and clear their history, but if you're looking to up your level of security, using a frugal environment (eg: a live-DVD)
is a popular next step.