This file is indexed.

/etc/sane.d/epjitsu.conf is in libsane 1.0.22-7ubuntu1.

This file is owned by root:root, with mode 0o644.

The actual contents of the file can be viewed below.

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# For scanners connected via USB on a known device (kernel driver):
#usb /dev/usb/scanner0

# For scanners connected via USB using vendor and device ids (libusb):
#usb VENDORID PRODUCTID

# NOTE: if you have to add your device here- please send the id and model
# to the author via email, so it can be included in next version. kitno455 at
# gmail dot com - with epjitsu in the subject line

# These devices require a firmware file in order to function, which must be
# extracted from the Fujitsu Windows driver. Presumably the Mac versions
# contain the firmware as well, but the author has no access such a machine.

# Firmware is installed in several different locations by the fujitsu software, 
# using the windows 'search' feature to look for '*.nal' is the easiest way to
# find them. They should be ~65K, and have the scanner's name as part of the
# file name. They are often inside a .cab file.

# Copy the file someplace sane can reach it. Then update the line below.
# NOTE: the firmware line must occur BEFORE the usb line for your scanner

# Fujitsu fi-60F
firmware /usr/share/sane/epjitsu/60f_0A00.nal
usb 0x04c5 0x10c7

# Fujitsu S300
firmware /usr/share/sane/epjitsu/300_0C00.nal
usb 0x04c5 0x1156

# Fujitsu S300M
firmware /usr/share/sane/epjitsu/300M_0C00.nal
usb 0x04c5 0x117f

# Fujitsu S1300
firmware /usr/share/sane/epjitsu/1300_0C26.nal
usb 0x04c5 0x11ed