Its always easy to do things using the command lines in Linux. To browse files of an ISO image is an easy task in Linux. Open a terminal window and type in the following commands.
sudo mkdir /media/iso
sudo modprobe loop
sudo mount filename.iso /media/iso -t iso9660 -o loop
cd /media/iso
Hereafter you will be able to navigate to the /media/iso folder and see the contents of the ISO image. To unmount the ISO, use the following command:
sudo umount /media/iso
I will explain the commands and options used specificly:
sudo modprobe loop ->loads/ installs the module for loopback file system support
iso9660 -> the file system used by CD roms
-t -> specify the file system type
-o loop -> for additional options while using a loopback filesystem
