mswsock.dll crashing Firefox

[Dr Doom]

Dear All,

I require some help understanding a issue I am having with mswsock.dll. My son plays Hero Squad online. It has always crashed Firefox with this error (see below). I have tried a number of suggestions none have fixed the problem. The game uses Unity Web Player and no-one on Unity support forum is replying to my thread and Gazillion (company who created the game) don't have a clue.

I have ran combofix, hijackthis & TDSSKiller none fixed this issue. I can supply logs on request (doubt they are needed though)

I have a few instances of mswsock.dll (see jpeg attached)

AdapterDeviceID: 0x1080
AdapterVendorID: 0x10de
Add-ons: %7B73a6fe31-595d-460b-a920-fcc0f8843232%7D:2.6.8.5,%7B972ce4c6-7e08-4474-a285-3208198ce6fd%7D:25.0.1
AvailablePageFile: 64205541376
AvailablePhysicalMemory: 29411909632
AvailableVirtualMemory: 3144990720
BuildID: 20131112160018
CrashTime: 1384818284
EMCheckCompatibility: true
InstallTime: 1384571040
Notes: AdapterVendorID: 0x10de, AdapterDeviceID: 0x1080, AdapterSubsysID: 00000000, AdapterDriverVersion: 9.18.13.3165
D2D? D2D+ DWrite? DWrite+ D3D10 Layers? D3D10 Layers+ WebGL? EGL? EGL+ GL Context? GL Context+ WebGL+
ProductID: {ec8030f7-c20a-464f-9b0e-13a3a9e97384}
ProductName: Firefox
ReleaseChannel: release
SecondsSinceLastCrash: 1225
StartupTime: 1384818166
SystemMemoryUsePercentage: 14
Theme: classic/1.0
Throttleable: 1
TotalVirtualMemory: 4294836224
URL: about:addons
Vendor: Mozilla
Version: 25.0.1
Winsock_LSP: MSAFD Tcpip [TCP/IP] : 2 : 1 : %SystemRoot%\system32\mswsock.dll
MSAFD Tcpip [UDP/IP] : 2 : 2 :
MSAFD Tcpip [RAW/IP] : 2 : 3 : %SystemRoot%\system32\mswsock.dll
MSAFD Tcpip [TCP/IPv6] : 2 : 1 :
MSAFD Tcpip [UDP/IPv6] : 2 : 2 : %SystemRoot%\system32\mswsock.dll
MSAFD Tcpip [RAW/IPv6] : 2 : 3 :
RSVP TCPv6 Service Provider : 2 : 1 : %SystemRoot%\system32\mswsock.dll
RSVP TCP Service Provider : 2 : 1 :
RSVP UDPv6 Service Provider : 2 : 2 : %SystemRoot%\system32\mswsock.dll
RSVP UDP Service Provider : 2 : 2 :

This report also contains technical information about the state of the application when it crashed.

[Creationist]

mswsock.dll free download - DLL-files.com - Download that and place it in your System32 folder, then try again.

[Dr Doom]

mswsock.dll free download - DLL-files.com - Download that and place it in your System32 folder, then try again.

already in System32 folder. I'm not a fan of these types of services either. Would just like info on why it is causing the problem