This file is indexed.

/usr/share/xscreensaver/config/molecule.xml is in xscreensaver-gl-extra 5.15-3ubuntu1.

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

The actual contents of the file can be viewed below.

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<?xml version="1.0" encoding="ISO-8859-1"?>

<screensaver name="molecule" _label="Molecule">

  <command arg="-root"/>

  <number id="delay" type="slider" arg="-delay %"
          _label="Frame rate" _low-label="Low" _high-label="High"
          low="0" high="100000" default="10000"
          convert="invert"/>

  <number id="timeout" type="slider" arg="-timeout %"
          _label="Duration" _low-label="5 seconds" _high-label="2 minutes"
          low="5" high="120" default="20"/>

  <hgroup>
   <vgroup>
    <boolean id="labels" _label="Label atoms" arg-unset="-no-labels"/>
    <boolean id="titles" _label="Describe molecule" arg-unset="-no-titles"/>
    <boolean id="bbox"   _label="Draw bounding box" arg-set="-bbox"/>
    <boolean id="wire"    _label="Wireframe"              arg-set="-wireframe"/>
   </vgroup>
   <vgroup>
    <boolean id="atoms"  _label="Draw atomic nuclei" arg-unset="-no-atoms"/>
    <boolean id="bonds"  _label="Draw atomic bonds" arg-unset="-no-bonds"/>
    <boolean id="shells" _label="Draw electron shells" arg-unset="-no-shells"/>
    <boolean id="showfps" _label="Show frame rate" arg-set="-fps"/>
   </vgroup>
  </hgroup>

  <hgroup>
   <boolean id="wander" _label="Wander" arg-set="-wander"/>

   <select id="rotation">
    <option id="no"  _label="Don't rotate"               arg-set="-spin 0"/>
    <option id="x"   _label="Rotate around X axis"       arg-set="-spin X"/>
    <option id="y"   _label="Rotate around Y axis"       arg-set="-spin Y"/>
    <option id="z"   _label="Rotate around Z axis"       arg-set="-spin Z"/>
    <option id="xy"  _label="Rotate around X and Y axes" arg-set="-spin XY"/>
    <option id="xz"  _label="Rotate around X and Z axes" arg-set="-spin XZ"/>
    <option id="yz"  _label="Rotate around Y and Z axes" arg-set="-spin YZ"/>
    <option id="xyz" _label="Rotate around all three axes"/>
   </select>
  </hgroup>

  <file id="molecule" _label="PDB file or directory" arg="-molecule %"/>

  <_description>
Draws several different representations of molecules.  Some common
molecules are built in, and it can also read PDB (Protein Data Bank)
files as input.

http://en.wikipedia.org/wiki/Protein_Data_Bank_%28file_format%29

Written by Jamie Zawinski; 2001.
  </_description>
</screensaver>