Firefox 6.0.2 keeps on crashing, problems with ajax calls

Question

Hi,
I am using the jquery form plugin to make ajax calls on my sites, when i invoke the plugin and have Firebug open I get this message:
Could not convert JavaScript argument arg 0 [nsISupports.QueryInterface]
[Break On This Error] callback.data = aElem....getComputedStyle(callback.data, '');
rfhelper32.js
Firebug also tells me that it's limit has been reached 1571 entries shown.
Can someone tell me why this is happening; is there a problem with Firefox that will be fixed. It's not happening in IE9
Here is the information from a recent crash report (which may or not be related to the above problem!)
AdapterDeviceID: 0a66
AdapterVendorID: 10de
Add-ons: [email protected]:3.0.4,{6AC85730-7D0F-4de0-B3FA-21142DD85326}:2.5.5,{8f8fe09b-0bd3-4470-bc1b-8cad42b8203a}:0.17,{e968fc70-8f95-4ab9-9e79-304de2a71ee1}:0.7.3,{f36c6cd1-da73-491d-b290-8fc9115bfa55}:2.2.0,{BBDA0591-3099-440a-AA10-41764D9DB4DB}:3.1,[email protected]:1.8.2,{2D3F3651-74B9-4795-BDEC-6DA2F431CB62}:2011.7.1.3,{972ce4c6-7e08-4474-a285-3208198ce6fd}:6.0.2
AvailableVirtualMemory: 174600192
BuildID: 20110902133214
CrashTime: 1316093326
EMCheckCompatibility: true
Email: [email protected]
FramePoisonBase: 00000000f0de0000
FramePoisonSize: 65536
InstallTime: 1315406279
Notes: AdapterVendorID: 10de, AdapterDeviceID: 0a66, AdapterDriverVersion: 8.16.11.9104
D3D10 Layers? D3D10 Layers-
D3D9 Layers? D3D9 Layers-
WebGL? WebGL-
ProductName: Firefox
ReleaseChannel: release
SecondsSinceLastCrash: 160793
StartupTime: 1316067225
SystemMemoryUsePercentage: 86
Theme: classic/1.0
Throttleable: 1
TotalVirtualMemory: 2147352576
URL: https://s-static.ak.fbcdn.net/connect/xd_proxy.php?version=3#cb=f1ae6be54ac01b4&origin=https%3A%2F%2Fwww.paypal-business.co.uk%2Ffd558408b2cb6c&relation=parent.parent&transport=postmessage&type=resize&height=20&ackData[id]=1&width=250
Vendor: Mozilla
Version: 6.0.2
Winsock_LSP: MSAFD Tcpip [TCP/IP] : 2 : 1 :
MSAFD Tcpip [UDP/IP] : 2 : 2 : %SystemRoot%\system32\mswsock.dll
MSAFD Tcpip [RAW/IP] : 2 : 3 :
MSAFD Tcpip [TCP/IPv6] : 2 : 1 : %SystemRoot%\system32\mswsock.dll
MSAFD Tcpip [UDP/IPv6] : 2 : 2 :
MSAFD Tcpip [RAW/IPv6] : 2 : 3 : %SystemRoot%\system32\mswsock.dll
RSVP TCPv6 Service Provider : 2 : 1 :
RSVP TCP Service Provider : 2 : 1 : %SystemRoot%\system32\mswsock.dll
RSVP UDPv6 Service Provider : 2 : 2 :
RSVP UDP Service Provider : 2 : 2 : %SystemRoot%\system32\mswsock.dll
MSAFD NetBIOS [\Device\NetBT_Tcpip_{91C733AA-510D-41D3-B67A-4441103BAE50}] SEQPACKET 1 : 2 : 5 :
MSAFD NetBIOS [\Device\NetBT_Tcpip_{91C733AA-510D-41D3-B67A-4441103BAE50}] DATAGRAM 1 : 2 : 2 : %SystemRoot%\system32\mswsock.dll
MSAFD NetBIOS [\Device\NetBT_Tcpip_{4A8E4D1C-24D8-40C3-BC41-D04B5D505F39}] SEQPACKET 5 : 2 : 5 :
MSAFD NetBIOS [\Device\NetBT_Tcpip_{4A8E4D1C-24D8-40C3-BC41-D04B5D505F39}] DATAGRAM 5 : 2 : 2 : %SystemRoot%\system32\mswsock.dll
MSAFD NetBIOS [\Device\NetBT_Tcpip_{C8F77A1D-B3A2-4DE2-AE72-C377BBD10D9A}] SEQPACKET 7 : 2 : 5 :
MSAFD NetBIOS [\Device\NetBT_Tcpip_{C8F77A1D-B3A2-4DE2-AE72-C377BBD10D9A}] DATAGRAM 7 : 2 : 2 : %SystemRoot%\system32\mswsock.dll
MSAFD NetBIOS [\Device\NetBT_Tcpip6_{C8F77A1D-B3A2-4DE2-AE72-C377BBD10D9A}] SEQPACKET 8 : 2 : 5 :
MSAFD NetBIOS [\Device\NetBT_Tcpip6_{C8F77A1D-B3A2-4DE2-AE72-C377BBD10D9A}] DATAGRAM 8 : 2 : 2 : %SystemRoot%\system32\mswsock.dll
MSAFD NetBIOS [\Device\NetBT_Tcpip6_{4A8E4D1C-24D8-40C3-BC41-D04B5D505F39}] SEQPACKET 6 : 2 : 5 :
MSAFD NetBIOS [\Device\NetBT_Tcpip6_{4A8E4D1C-24D8-40C3-BC41-D04B5D505F39}] DATAGRAM 6 : 2 : 2 : %SystemRoot%\system32\mswsock.dll
MSAFD NetBIOS [\Device\NetBT_Tcpip6_{3D95D40E-1835-44C6-A621-968094D90452}] SEQPACKET 10 : 2 : 5 :
MSAFD NetBIOS [\Device\NetBT_Tcpip6_{3D95D40E-1835-44C6-A621-968094D90452}] DATAGRAM 10 : 2 : 2 : %SystemRoot%\system32\mswsock.dll
MSAFD NetBIOS [\Device\NetBT_Tcpip6_{D6AD3B6C-2F8E-49B4-BDCD-DB35518116E7}] SEQPACKET 9 : 2 : 5 :
MSAFD NetBIOS [\Device\NetBT_Tcpip6_{D6AD3B6C-2F8E-49B4-BDCD-DB35518116E7}] DATAGRAM 9 : 2 : 2 : %SystemRoot%\system32\mswsock.dll
MSAFD NetBIOS [\Device\NetBT_Tcpip6_{18908ACF-76C1-4139-8C1C-89DF049156C5}] SEQPACKET 4 : 2 : 5 :
MSAFD NetBIOS [\Device\NetBT_Tcpip6_{18908ACF-76C1-4139-8C1C-89DF049156C5}] DATAGRAM 4 : 2 : 2 : %SystemRoot%\system32\mswsock.dll
MSAFD NetBIOS [\Device\NetBT_Tcpip6_{4112C824-372C-4014-87AE-1BC13EA6E4CD}] SEQPACKET 3 : 2 : 5 :
MSAFD NetBIOS [\Device\NetBT_Tcpip6_{4112C824-372C-4014-87AE-1BC13EA6E4CD}] DATAGRAM 3 : 2 : 2 : %SystemRoot%\system32\mswsock.dll
MSAFD NetBIOS [\Device\NetBT_Tcpip6_{2E408326-9611-4C41-B766-C4CB82734986}] SEQPACKET 0 : 2 : 5 :
MSAFD NetBIOS [\Device\NetBT_Tcpip6_{2E408326-9611-4C41-B766-C4CB82734986}] DATAGRAM 0 : 2 : 2 : %SystemRoot%\system32\mswsock.dll
MSAFD NetBIOS [\Device\NetBT_Tcpip6_{91C733AA-510D-41D3-B67A-4441103BAE50}] SEQPACKET 2 : 2 : 5 :
MSAFD NetBIOS [\Device\NetBT_Tcpip6_{91C733AA-510D-41D3-B67A-4441103BAE50}] DATAGRAM 2 : 2 : 2 : %SystemRoot%\system32\mswsock.dll
VMCI sockets DGRAM : 0 : 2 :
VMCI sockets STREAM : 0 : 1 : C:\Program Files\VMware\VMware Workstation\vsocklib.dll
This report also contains technical information about the state of the application when it crashed.

Answer 1

Try the Firefox SafeMode to see how it works there. <br />
''A troubleshooting mode, which disables most Add-ons.'' <br />
''(If you're not using it, switch to the Default Theme.)''
* You can open the Firefox 4/5/6/7 SafeMode by holding the '''Shft''' key when you use the Firefox desktop or Start menu shortcut.
* Or use the Help menu item, click on '''Restart with Add-ons Disabled...''' while Firefox is running. <br />
''Don't select anything right now, just use "Continue in SafeMode."''
''To exit the Firefox Safe Mode, just close Firefox and wait a few seconds before using the Firefox shortcut (without the Shft key) to open it again.''
If it is good in the Firefox SafeMode, your problem is probably caused by an extension, and you need to figure out which one. <br />
http://support.mozilla.com/en-US/kb/troubleshooting+extensions+and+themes