/usr/include/freefoam/coalCombustion/ is in libfreefoam-dev 0.1.0+dfsg+1-3.
This file is owned by root:root, with mode 0o755.
..
/usr/include/freefoam/coalCombustion/COxidationDiffusionLimitedRate.C
/usr/include/freefoam/coalCombustion/COxidationDiffusionLimitedRate.H
/usr/include/freefoam/coalCombustion/COxidationKineticDiffusionLimitedRate.C
/usr/include/freefoam/coalCombustion/COxidationKineticDiffusionLimitedRate.H
/usr/include/freefoam/coalCombustion/COxidationMurphyShaddix.C
/usr/include/freefoam/coalCombustion/COxidationMurphyShaddix.H
/usr/include/freefoam/coalCombustion/CoalCloud.H
/usr/include/freefoam/coalCombustion/CoalParcel.C
/usr/include/freefoam/coalCombustion/CoalParcel.H
/usr/include/freefoam/coalCombustion/createCoalParcelTypes.H
/usr/include/freefoam/coalCombustion/forceLink.C
/usr/include/freefoam/coalCombustion/makeCoalParcelSurfaceReactionModels.H