Recurring kernel panic

My MacBook's started experiencing kernel panics in the last few months. I've had 4 since the beginning of February, and I'm not sure what the issue is. After the second time, I verified and repaired the start-up disk successfully, and my MacBook was fine for almost two months, before it happened again. I repaired the start-up disk again, and this time it only took two weeks before another panic happened, so it seems to be accelerating?

Here's the report, if that helps anybody:

Interval Since Last Panic Report: 398107 sec
Panics Since Last Report: 1
Anonymous UUID: DBBF1688-2311-42F7-B187-E16083953F6E

Mon Apr 15 16:19:42 2013
panic(cpu 1 caller 0x2abf6a): Kernel trap at 0x00cd72bc, type 14=page fault, registers:
CR0: 0x80010033, CR2: 0x4db450d4, CR3: 0x158b6000, CR4: 0x00000660
EAX: 0x4db450d4, EBX: 0x44270000, ECX: 0x4db450d4, EDX: 0x00d01e60
CR2: 0x4db450d4, EBP: 0x00f12898, ESI: 0x00000000, EDI: 0x00000000
EFL: 0x00010246, EIP: 0x00cd72bc, CS: 0x00000008, DS: 0x03690010
Error code: 0x00000002

Backtrace (CPU 1), Frame : Return Address (4 potential args on stack)
0xf126b8 : 0x21b837 (0x5dd7fc 0xf126ec 0x223ce1 0x0)
0xf12708 : 0x2abf6a (0x59e3d0 0xcd72bc 0xe 0x59e59a)
0xf127e8 : 0x2a1a78 (0xf12800 0xf1286c 0xf12898 0xcd72bc)
0xf127f8 : 0xcd72bc (0xe 0x48 0xf10010 0x230010)
0xf12898 : 0xca02f6 (0x44270000 0x4db450d4 0x0 0x0)
0xf128e8 : 0xca01a1 (0x44270000 0x44270788 0x1 0xc9d)
0xf12908 : 0xc6788f (0x44270000 0x44270788 0xf12968 0x10ca620)
0xf12938 : 0xca1c64 (0x44270000 0xf12a7c 0x1 0x0)
0xf12978 : 0xc6bc93 (0x44270000 0xf12a7c 0x0 0x0)
0xf12ab8 : 0xca55d8 (0x44270000 0x1 0xf12bcc 0xf12bc8)
0xf12b68 : 0xc67fe1 (0x44270000 0x1 0xf12bcc 0xf12bc8)
0xf12be8 : 0x56da06 (0x44270000 0x0 0xf12e3c 0xf12c74)
0xf12c38 : 0x56e2a5 (0xcf6720 0x44270000 0xa399a88 0x1)
0xf12c88 : 0x56eb59 (0x44270000 0x10 0xf12cd0 0x0)
0xf12da8 : 0x286638 (0x44270000 0x10 0xa399a88 0x1)
0xf13e58 : 0x21dbe5 (0xa399a60 0x9edc5a0 0x7fb98 0x9517)
0xf13e98 : 0x210a86 (0xa399a00 0x0 0xd034dc0 0xc5e3e00)
0xf13ef8 : 0x216f84 (0xa399a00 0x0 0x0 0x0)
0xf13f78 : 0x295c57 (0xa4ed7a8 0x0 0x0 0x0)
0xf13fc8 : 0x2a256d (0xa4ed7a4 0x0 0x10 0xa4ed7a4)
Kernel Extensions in backtrace (with dependencies):
com.apple.GeForce(6.3.6)@0xc5c000->0xd12fff
dependency: com.apple.NVDAResman(6.3.6)@0x96e000
dependency: com.apple.iokit.IONDRVSupport(2.2.1)@0x961000
dependency: com.apple.iokit.IOPCIFamily(2.6.5)@0x928000
dependency: com.apple.iokit.IOGraphicsFamily(2.2.1)@0x93f000

BSD process name corresponding to current thread: plugin-container

Mac OS version:
10K549

Kernel version:
Darwin Kernel Version 10.8.0: Tue Jun 7 16:33:36 PDT 2011; root:xnu-1504.15.3~1/RELEASE_I386
System model name: MacBookPro7,1 (Mac-F222BEC8)

System uptime in nanoseconds: 13869318677191
unloaded kexts:
com.apple.driver.AppleMCP89RootPortPM 1.11 (addr 0x1438000, size 0x20480) - last unloaded 86815398708
loaded kexts:
com.rim.driver.BlackBerryUSBDriverInt 0.0.74
com.apple.driver.AppleHWSensor 1.9.3d0 - last loaded 24602458777
com.apple.filesystems.autofs 2.1.0
com.apple.driver.IOBluetoothBNEPDriver 2.4.5f3
com.apple.driver.AppleMikeyHIDDriver 1.2.0
com.apple.driver.AppleHDA 2.0.5f14
com.apple.driver.AGPM 100.12.31
com.apple.driver.AppleMikeyDriver 2.0.5f14
com.apple.driver.AudioAUUC 1.57
com.apple.driver.AppleUpstreamUserClient 3.5.7
com.apple.driver.AppleMCCSControl 1.0.20
com.apple.driver.SMCMotionSensor 3.0.1d2
com.apple.Dont_Steal_Mac_OS_X 7.0.0
com.apple.driver.AudioIPCDriver 1.1.6
com.apple.driver.AppleIntelPenrynProfile 17
com.apple.driver.ACPI_SMC_PlatformPlugin 4.7.0a1
com.apple.driver.AppleLPC 1.5.1
com.apple.driver.AppleBacklight 170.0.46
com.apple.kext.AppleSMCLMU 1.5.2d10
com.apple.GeForce 6.3.6
com.apple.driver.AppleUSBTCButtons 201.6
com.apple.driver.AppleIRController 303.8
com.apple.driver.AppleUSBTCKeyboard 201.6
com.apple.driver.AppleUSBCardReader 2.6.1
com.apple.iokit.SCSITaskUserClient 2.6.8
com.apple.BootCache 31.1
com.apple.AppleFSCompression.AppleFSCompressionTypeZlib 1.0.0d1
com.apple.iokit.IOAHCIBlockStorage 1.6.4
com.apple.driver.AppleHPET 1.5
com.apple.iokit.AppleBCM5701Ethernet 3.0.5b8
com.apple.driver.AirPortBrcm43224 428.42.4
com.apple.driver.AppleFWOHCI 4.7.3
com.apple.driver.AppleAHCIPort 2.1.7
com.apple.driver.AppleUSBHub 4.2.4
com.apple.driver.AppleUSBEHCI 4.2.4
com.apple.driver.AppleUSBOHCI 4.2.0
com.apple.driver.AppleEFINVRAM 1.4.0
com.apple.driver.AppleRTC 1.3.1
com.apple.driver.AppleSmartBatteryManager 160.0.0
com.apple.driver.AppleACPIButtons 1.3.6
com.apple.driver.AppleSMBIOS 1.7
com.apple.driver.AppleACPIEC 1.3.6
com.apple.driver.AppleAPIC 1.4
com.apple.driver.AppleIntelCPUPowerManagementClient 142.6.0
com.apple.security.sandbox 1
com.apple.security.quarantine 0
com.apple.nke.applicationfirewall 2.1.14
com.apple.driver.AppleIntelCPUPowerManagement 142.6.0
com.apple.driver.DspFuncLib 2.0.5f14
com.apple.driver.AppleProfileReadCounterAction 17
com.apple.driver.AppleProfileTimestampAction 10
com.apple.driver.AppleProfileThreadInfoAction 14
com.apple.driver.AppleProfileRegisterStateAction 10
com.apple.driver.AppleProfileKEventAction 10
com.apple.driver.AppleProfileCallstackAction 20
com.apple.iokit.IOFireWireIP 2.0.3
com.apple.iokit.IOSurface 74.2
com.apple.iokit.IOBluetoothSerialManager 2.4.5f3
com.apple.iokit.IOSerialFamily 10.0.3
com.apple.iokit.IOAudioFamily 1.8.3fc2
com.apple.kext.OSvKernDSPLib 1.3
com.apple.driver.AppleHDAController 2.0.5f14
com.apple.iokit.IOHDAFamily 2.0.5f14
com.apple.driver.AppleSMBusController 1.0.10d0
com.apple.iokit.AppleProfileFamily 41
com.apple.driver.IOPlatformPluginFamily 4.7.0a1
com.apple.driver.AppleSMBusPCI 1.0.10d0
com.apple.driver.AppleBacklightExpert 1.0.1
com.apple.driver.AppleSMC 3.1.0d5
com.apple.nvidia.nv50hal 6.3.6
com.apple.NVDAResman 6.3.6
com.apple.iokit.IONDRVSupport 2.2.1
com.apple.iokit.IOGraphicsFamily 2.2.1
com.apple.driver.BroadcomUSBBluetoothHCIController 2.4.5f3
com.apple.driver.AppleUSBBluetoothHCIController 2.4.5f3
com.apple.iokit.IOBluetoothFamily 2.4.5f3
com.apple.driver.AppleUSBMultitouch 207.7
com.apple.iokit.IOUSBHIDDriver 4.2.0
com.apple.iokit.IOSCSIMultimediaCommandsDevice 2.6.8
com.apple.iokit.IOBDStorageFamily 1.6
com.apple.iokit.IODVDStorageFamily 1.6
com.apple.iokit.IOCDStorageFamily 1.6.1
com.apple.driver.AppleUSBMergeNub 4.2.4
com.apple.driver.XsanFilter 402.1
com.apple.iokit.IOAHCISerialATAPI 1.2.6
com.apple.iokit.IO80211Family 320.1
com.apple.iokit.IONetworkingFamily 1.10
com.apple.iokit.IOFireWireFamily 4.2.6
com.apple.iokit.IOAHCIFamily 2.0.6
com.apple.iokit.IOUSBUserClient 4.2.4
com.apple.driver.NVSMU 2.2.7
com.apple.driver.AppleEFIRuntime 1.4.0
com.apple.iokit.IOHIDFamily 1.6.6
com.apple.iokit.IOSMBusFamily 1.1
com.apple.kext.AppleMatch 1.0.0d1
com.apple.security.TMSafetyNet 6
com.apple.iokit.IOUSBMassStorageClass 2.6.7
com.apple.driver.AppleUSBComposite 3.9.0
com.apple.iokit.IOSCSIBlockCommandsDevice 2.6.8
com.apple.iokit.IOSCSIArchitectureModelFamily 2.6.8
com.apple.iokit.IOUSBFamily 4.2.4
com.apple.driver.DiskImages 289.1
com.apple.iokit.IOStorageFamily 1.6.3
com.apple.driver.AppleACPIPlatform 1.3.6
com.apple.iokit.IOPCIFamily 2.6.5
com.apple.iokit.IOACPIFamily 1.3.0


Some other facts that may be of help:

• I'm currently running Mac OS X 10.6.8 (which as far as I know is Snow Leopard) with a 250GB hard drive. My MacBook is roughly 2.5 years old. (And thus out of warranty. Of course.) All software is up-to-date.
• All four of my panics occurred while I was using Firefox. I can't find any other shared facts. There wasn't any lagging right before the kernel panic happened.
• Recently, I did notice Firefox sometimes freezes when I open multiple tabs (even when multiple is 2) and when it unfreezes the pixels in the window might jump around a little bit when I move my cursor. This doesn't happen right before the kernel panic, though, and goes away when I quit and restart Firefox. (Pretty sure the pixel thing is a Firefox-related issue, but you never know.)
• I erased the PRAM. Made no difference.

There's no Apple store anywhere close to me (closest would be Amsterdam, 150 miles/250km) and the repair service I could use is pretty expensive and will take my baby away for upwards of 6 weeks. Mostly what I'm wondering is: is this a problem that can be solved by simply formatting my hard drive, reinstalling OS X and restoring from Time Machine? Or should I buy a new hard drive altogether? (I've heard people talk about DiskWarrior, but that thing is expensive and if I buy it and it doesn't work, I'll be out of funds to buy a new hard drive.)

I'd appreciate any help anybody could give me, because honestly, I can troubleshoot with help of the Internet as much as the next person, but I'm hardly an expert.

Thanks in advance!

 

Bold: Graphics related.

Here's what you can do, first run Apple Hardware Test:

Intel-based Macs: Using Apple Hardware Test

Do the extended test, see if there are any Errors.
Second, run a high demanding game and look if it crashes again, if not GPU is most likely OK and Firefox is the problem.

Here is another thread about Geforce 320M problems, you might find something:

Graphics Card Glitching? Or Lion Problem? nVidia 320m

 

Thanks for the speedy help. I did the extended hardware test, everything was fine, but I'm not sure if that's a good or a bad thing. If the hardware is working fine, I'm wondering if formatting my hard drive and reinstalling won't solve the issue after all...

The only game I have on here is Sims 3, so I suppose I'll play around with that and see if it triggers anything. I also checked out the link you gave me, but most of those problems seem to be connected to Lion. Though I'll keep an eye out.

 

Apple's hardware Test is not 100% guaranteed to find Errors, I would use Safari for a while and see what happens.