Many of us like portable software because they don't need to install and we can carry them in our USB drives.
Many times we need portable version of a software to test it before installing.
So if you don't want to install Mozilla Firefox browser in your system but still want to try it, you can download the portable version and can directly run it without any installation.
You can also store it in your USB thumb drive and can carry it with you to use it anywhere you want.
You can download it using following link: