Answer by ephemerr for How can I mount a disk image?

Nowadays you can minimize your work by using udisks. Solution from ArchWiki: udisks - Mount loop devices

To easily mount ISO images, use the following command:

udisksctl loop-setup -r -f image.iso

This will create a loop device and show the ISO image ready to mount. Once unmounted, the loop device will be terminated by udev.

-r there for read only option.