/usr/lib/freefoam/ is in libfreefoam-dev 0.1.0+dfsg-1build1.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/freefoam/libEulerianInterfacialModels.so
/usr/lib/freefoam/libIOFunctionObjects.so
/usr/lib/freefoam/libLESdeltas.so
/usr/lib/freefoam/libLESfilters.so
/usr/lib/freefoam/libODE.so
/usr/lib/freefoam/libOSspecific.so
/usr/lib/freefoam/libOpenFOAM.so
/usr/lib/freefoam/libautoMesh.so
/usr/lib/freefoam/libbarotropicCompressibilityModel.so
/usr/lib/freefoam/libbasicThermophysicalModels.so
/usr/lib/freefoam/libchemistryModel.so
/usr/lib/freefoam/libcoalCombustion.so
/usr/lib/freefoam/libcombustionModels.so
/usr/lib/freefoam/libcompressibleLESModels.so
/usr/lib/freefoam/libcompressibleRASModels.so
/usr/lib/freefoam/libcompressibleTurbulenceModel.so
/usr/lib/freefoam/libconversion.so
/usr/lib/freefoam/libdecompositionMethods.so
/usr/lib/freefoam/libdieselSpray.so
/usr/lib/freefoam/libdsmc.so
/usr/lib/freefoam/libdynamicFvMesh.so
/usr/lib/freefoam/libdynamicMesh.so
/usr/lib/freefoam/libedgeMesh.so
/usr/lib/freefoam/libengine.so
/usr/lib/freefoam/liberrorEstimation.so
/usr/lib/freefoam/libextrudeModel.so
/usr/lib/freefoam/libfieldFunctionObjects.so
/usr/lib/freefoam/libfiniteVolume.so
/usr/lib/freefoam/libfoamCalcFunctions.so
/usr/lib/freefoam/libforces.so
/usr/lib/freefoam/libfvMotionSolvers.so
/usr/lib/freefoam/libgenericPatchFields.so
/usr/lib/freefoam/libincompressibleLESModels.so
/usr/lib/freefoam/libincompressibleRASModels.so
/usr/lib/freefoam/libincompressibleTransportModels.so
/usr/lib/freefoam/libincompressibleTurbulenceModel.so
/usr/lib/freefoam/libinterfaceProperties.so
/usr/lib/freefoam/libkineticTheoryModel.so
/usr/lib/freefoam/liblagrangian.so
/usr/lib/freefoam/liblagrangianIntermediate.so
/usr/lib/freefoam/liblaminarFlameSpeedModels.so
/usr/lib/freefoam/libliquidMixture.so
/usr/lib/freefoam/libliquids.so
/usr/lib/freefoam/libmeshTools.so
/usr/lib/freefoam/libmolecularMeasurements.so
/usr/lib/freefoam/libmolecule.so
/usr/lib/freefoam/libmultiphaseMixture.so
/usr/lib/freefoam/libpdf.so
/usr/lib/freefoam/libphaseModel.so
/usr/lib/freefoam/libpostCalc.so
/usr/lib/freefoam/libpotential.so
/usr/lib/freefoam/libradiation.so
/usr/lib/freefoam/librandomProcesses.so
/usr/lib/freefoam/libreactionThermophysicalModels.so
/usr/lib/freefoam/librhoCentralBCs.so
/usr/lib/freefoam/libsampling.so
/usr/lib/freefoam/libscotchDecomp.so
/usr/lib/freefoam/libsolidMixture.so
/usr/lib/freefoam/libsolidParticle.so
/usr/lib/freefoam/libsolids.so
/usr/lib/freefoam/libspecie.so
/usr/lib/freefoam/libsurfMesh.so
/usr/lib/freefoam/libsystemCall.so
/usr/lib/freefoam/libthermophysicalFunctions.so
/usr/lib/freefoam/libtopoChangerFvMesh.so
/usr/lib/freefoam/libtriSurface.so
/usr/lib/freefoam/libtwoPhaseInterfaceProperties.so
/usr/lib/freefoam/libutilityFunctionObjects.so