Q: What does this panic report mean?

Can anyone help me with this panic report?  Overnight my mac keeps turning itself off and this appears.  I don't know what I should do about it.  Do you?

Anonymous UUID:       F5CC5B85-7033-877E-A675-06238C13AD36

Thu Nov  5 17:13:29 2015

*** Panic Report ***

panic(cpu 2 caller 0xffffff8019e16df2): Kernel trap at 0xffffff7f9c6517de, type 14=page fault, registers:

CR0: 0x0000000080010033, CR2: 0xffffff809a79e934, CR3: 0x000000001ffcc107, CR4: 0x00000000000226e0

RAX: 0xffffff809a79e930, RBX: 0xffffff8028990800, RCX: 0xffffff809ad18000, RDX: 0x0000000000001960

RSP: 0xffffff8021d73950, RBP: 0xffffff8021d73970, RSI: 0xffffff8028990e20, RDI: 0xffffff8028990800

R8:  0xffffff7f9c690802, R9:  0x0000000000000823, R10: 0xffffff809a239040, R11: 0x00000000000000c0

R12: 0xffffff809ad98000, R13: 0xffffff8028990800, R14: 0xffffff8021d73aa0, R15: 0xffffff8028990e20

RFL: 0x0000000000010206, RIP: 0xffffff7f9c6517de, CS:  0x0000000000000008, SS:  0x0000000000000010

Fault CR2: 0xffffff809a79e934, Error code: 0x0000000000000000, Fault CPU: 0x2

Backtrace (CPU 2), Frame : Return Address

0xffffff8021d73600 : 0xffffff8019d2ad21

0xffffff8021d73680 : 0xffffff8019e16df2

0xffffff8021d73840 : 0xffffff8019e33ca3

0xffffff8021d73860 : 0xffffff7f9c6517de

0xffffff8021d73970 : 0xffffff7f9c681ce5

0xffffff8021d739a0 : 0xffffff7f9c6509dd

0xffffff8021d73ae0 : 0xffffff7f9c64efe5

0xffffff8021d73b30 : 0xffffff801a2fff36

0xffffff8021d73b60 : 0xffffff801a30165b

0xffffff8021d73bc0 : 0xffffff801a2fede3

0xffffff8021d73d00 : 0xffffff8019de1307

0xffffff8021d73e10 : 0xffffff8019d2ef8c

0xffffff8021d73e40 : 0xffffff8019d139f3

0xffffff8021d73e90 : 0xffffff8019d2429d

0xffffff8021d73f10 : 0xffffff8019e0231a

0xffffff8021d73fb0 : 0xffffff8019e344c6

      Kernel Extensions in backtrace:

         com.apple.driver.AppleIntelHDGraphics(10.0)[9761A2AF-E96C-3B9E-82A4-DA391628FD4 E]@0xffffff7f9c644000->0xffffff7f9c707fff

            dependency: com.apple.iokit.IOPCIFamily(2.9)[05578B0B-C99C-3A87-9F3E-B4746D19CEF4]@0xffffff 7f9a524000

            dependency: com.apple.iokit.IOGraphicsFamily(2.4.1)[8922721D-5517-3883-BD3A-57422D0244A0]@0 xffffff7f9a920000

BSD process name corresponding to current thread: firefox

Mac OS version:

14F1021

Kernel version:

Darwin Kernel Version 14.5.0: Tue Sep  1 21:23:09 PDT 2015; root:xnu-2782.50.1~1/RELEASE_X86_64

Kernel UUID: 06D286E3-A8A1-3BE7-A7EB-EAC6E0C69758

Kernel slide:     0x0000000019a00000

Kernel text base: 0xffffff8019c00000

__HIB  text base: 0xffffff8019b00000

System model name: MacBookPro6,2 (Mac-F22586C8)

System uptime in nanoseconds: 51617525310923

last loaded kext at 32826906591047: com.apple.driver.AppleUSBCDC 4.3.3b1 (addr 0xffffff7f9cc0c000, size 20480)

last unloaded kext at 32974759578488: com.apple.driver.AppleUSBCDC 4.3.3b1 (addr 0xffffff7f9cc0c000, size 16384)

loaded kexts:

com.apple.filesystems.smbfs 3.0.2

com.apple.driver.AppleHWSensor 1.9.5d0

com.apple.driver.AudioAUUC 1.70

com.apple.driver.AGPM 110.19.6

com.apple.filesystems.autofs 3.0

com.apple.iokit.IOBluetoothSerialManager 4.3.6f3

com.apple.driver.AppleOSXWatchdog 1

com.apple.driver.AppleMikeyHIDDriver 124

com.apple.driver.AppleMikeyDriver 272.18.3

com.apple.driver.AppleHDA 272.18.3

com.apple.driver.AppleSMCLMU 2.0.7d0

com.apple.iokit.IOUserEthernet 1.0.1

com.apple.Dont_Steal_Mac_OS_X 7.0.0

com.apple.driver.AppleHWAccess 1

com.apple.driver.AppleHV 1

com.apple.driver.AppleIntelSlowAdaptiveClocking 4.0.0

com.apple.driver.AppleLPC 1.7.3

com.apple.iokit.BroadcomBluetoothHostControllerUSBTransport 4.3.6f3

com.apple.driver.AppleSMCPDRC 1.0.0

com.apple.GeForceTesla 10.0.0

com.apple.driver.ACPI_SMC_PlatformPlugin 1.0.0

com.apple.driver.AppleUpstreamUserClient 3.6.1

com.apple.driver.AppleMuxControl 3.10.25

com.apple.driver.AppleMCCSControl 1.2.12

com.apple.driver.AppleIntelHDGraphics 10.0.0

com.apple.driver.AppleIntelHDGraphicsFB 10.0.0

com.apple.driver.SMCMotionSensor 3.0.4d1

com.apple.driver.AppleUSBTCButtons 240.2

com.apple.driver.AppleUSBCardReader 3.5.5

com.apple.driver.AppleUSBTCKeyboard 240.2

com.apple.AppleFSCompression.AppleFSCompressionTypeDataless 1.0.0d1

com.apple.AppleFSCompression.AppleFSCompressionTypeZlib 1.0.0

com.apple.BootCache 36

com.apple.driver.AppleIRController 327.5

com.apple.iokit.SCSITaskUserClient 3.7.5

com.apple.driver.XsanFilter 404

com.apple.iokit.IOAHCIBlockStorage 2.7.1

com.apple.driver.AppleUSBHub 705.4.2

com.apple.driver.AirPort.Brcm4331 800.20.24

com.apple.iokit.AppleBCM5701Ethernet 10.1.3

com.apple.driver.AppleUSBEHCI 705.4.14

com.apple.driver.AppleFWOHCI 5.5.2

com.apple.driver.AppleAHCIPort 3.1.2

com.apple.driver.AppleSmartBatteryManager 161.0.0

com.apple.driver.AppleACPIButtons 3.1

com.apple.driver.AppleRTC 2.0

com.apple.driver.AppleHPET 1.8

com.apple.driver.AppleSMBIOS 2.1

com.apple.driver.AppleACPIEC 3.1

com.apple.driver.AppleAPIC 1.7

com.apple.driver.AppleIntelCPUPowerManagementClient 218.0.0

com.apple.nke.applicationfirewall 161

com.apple.security.quarantine 3

com.apple.security.TMSafetyNet 8

com.apple.driver.AppleIntelCPUPowerManagement 218.0.0

com.apple.AppleGraphicsDeviceControl 3.10.25

com.apple.kext.triggers 1.0

com.apple.iokit.IOSerialFamily 11

com.apple.driver.DspFuncLib 272.18.3

com.apple.kext.OSvKernDSPLib 1.15

com.apple.iokit.IOSurface 97.4

com.apple.iokit.IOSlowAdaptiveClockingFamily 1.0.0

com.apple.driver.AppleSMBusPCI 1.0.12d1

com.apple.iokit.IOBluetoothHostControllerUSBTransport 4.3.6f3

com.apple.iokit.IOBluetoothFamily 4.3.6f3

com.apple.nvidia.classic.NVDANV50HalTesla 10.0.0

com.apple.nvidia.classic.NVDAResmanTesla 10.0.0

com.apple.driver.IOPlatformPluginLegacy 1.0.0

com.apple.driver.IOPlatformPluginFamily 5.9.1d7

com.apple.iokit.IOUSBUserClient 705.4.0

com.apple.driver.AppleHDAController 272.18.3

com.apple.iokit.IOHDAFamily 272.18.3

com.apple.iokit.IOAudioFamily 203.3

com.apple.vecLib.kext 1.2.0

com.apple.iokit.IOFireWireIP 2.2.6

com.apple.driver.AppleGraphicsControl 3.10.25

com.apple.driver.AppleBacklightExpert 1.1.0

com.apple.driver.AppleSMBusController 1.0.13d1

com.apple.iokit.IONDRVSupport 2.4.1

com.apple.iokit.IOGraphicsFamily 2.4.1

com.apple.driver.AppleSMC 3.1.9

com.apple.iokit.IOSCSIBlockCommandsDevice 3.7.5

com.apple.iokit.IOUSBMassStorageClass 3.7.2

com.apple.driver.AppleUSBMultitouch 245.2

com.apple.driver.CoreStorage 471.30.1

com.apple.iokit.IOUSBHIDDriver 705.4.0

com.apple.driver.AppleUSBMergeNub 705.4.0

com.apple.driver.AppleUSBComposite 705.4.9

com.apple.iokit.IOSCSIMultimediaCommandsDevice 3.7.5

com.apple.iokit.IOBDStorageFamily 1.7

com.apple.iokit.IODVDStorageFamily 1.7.1

com.apple.iokit.IOCDStorageFamily 1.7.1

com.apple.iokit.IOAHCISerialATAPI 2.6.1

com.apple.iokit.IOSCSIArchitectureModelFamily 3.7.5

com.apple.iokit.IOEthernetAVBController 1.0.3b3

com.apple.iokit.IO80211Family 730.60

com.apple.driver.mDNSOffloadUserClient 1.0.1b8

com.apple.iokit.IONetworkingFamily 3.2

com.apple.iokit.IOFireWireFamily 4.5.8

com.apple.iokit.IOUSBFamily 720.4.4

com.apple.iokit.IOAHCIFamily 2.7.5

com.apple.driver.AppleEFINVRAM 2.0

com.apple.driver.AppleEFIRuntime 2.0

com.apple.iokit.IOHIDFamily 2.0.0

com.apple.iokit.IOSMBusFamily 1.1

com.apple.security.sandbox 300.0

com.apple.kext.AppleMatch 1.0.0d1

com.apple.driver.AppleKeyStore 2

com.apple.driver.AppleMobileFileIntegrity 1.0.5

com.apple.driver.AppleCredentialManager 1.0

com.apple.driver.DiskImages 398

com.apple.iokit.IOStorageFamily 2.0

com.apple.iokit.IOReportFamily 31

com.apple.driver.AppleFDEKeyStore 28.30

com.apple.driver.AppleACPIPlatform 3.1

com.apple.iokit.IOPCIFamily 2.9

com.apple.iokit.IOACPIFamily 1.4

com.apple.kec.Libm 1

com.apple.kec.pthread 1

com.apple.kec.corecrypto 1.0

Unable to gather system configuration information.Model: MacBookPro6,2, BootROM MBP61.0057.B11, 2 processors, Intel Core i5, 2.4 GHz, 4 GB, SMC 1.58f17

Graphics: Intel HD Graphics, Intel HD Graphics, Built-In

Graphics: NVIDIA GeForce GT 330M, NVIDIA GeForce GT 330M, PCIe, 256 MB

Memory Module: BANK 0/DIMM0, 2 GB, DDR3, 1067 MHz, 0x802C, 0x384A53463235363634485A2D314731443120

Memory Module: BANK 1/DIMM0, 2 GB, DDR3, 1067 MHz, 0x802C, 0x384A53463235363634485A2D314731443120

AirPort: spairport_wireless_card_type_airport_extreme (0x14E4, 0x93), Broadcom BCM43xx 1.0 (5.106.98.100.24)

Bluetooth: Version 4.3.6f3 16238, 3 services, 27 devices, 8 incoming serial ports

Network Service: Wi-Fi, AirPort, en1

Serial ATA Device: Hitachi HTS545032B9SA02, 320.07 GB

Serial ATA Device: MATSHITADVD-R   UJ-898

USB Device: Hub

USB Device: USB Receiver

USB Device: Apple Internal Keyboard / Trackpad

USB Device: Internal Memory Card Reader

USB Device: BRCM2070 Hub

USB Device: Bluetooth USB Host Controller

USB Device: Hub

USB Device: IR Receiver

USB Device: Built-in iSight

Thunderbolt Bus: