Firefox is mangling the WM_NAME property

[cjsmall]

I have a script that monitors the WM_NAME property of applications. Firefox is mangling this property with encoded multiple tab titles. For example, rather than a simple string identifying this as Firefox, you get something like:

WM_NAME(COMPOUND_TEXT) = 0x57, 0x68, 0x61, 0x74, 0x3f, 0x73, 0x20, 0x74, 0x68, 0x65, 0x20, 0x4d, 0x61, 0x74, 0x74, 0x65, 0x72, 0x20, 0x57, 0x69, 0x74, 0x68, 0x20, 0x56, 0x61, 0x73, 0x73, 0x61, 0x72, 0x3f, 0x20, 0x2d, 0x20, 0x42, 0x79, 0x20, 0x53, 0x74, 0x61, 0x6e, 0x6c, 0x65, 0x79, 0x20, 0x4b, 0x75, 0x72, 0x74, 0x7a, 0x20, 0x2d, 0x20, 0x54, 0x68, 0x65, 0x20, 0x43, 0x6f, 0x72, 0x6e, 0x65, 0x72, 0x20, 0x2d, 0x20, 0x4e, 0x61, 0x74, 0x69, 0x6f, 0x6e, 0x61, 0x6c, 0x20, 0x52, 0x65, 0x76, 0x69, 0x65, 0x77, 0x20, 0x4f, 0x6e, 0x6c, 0x69, 0x6e, 0x65, 0x20, 0x2d, 0x20, 0x4d, 0x6f, 0x7a, 0x69, 0x6c, 0x6c, 0x61, 0x20, 0x46, 0x69, 0x72, 0x65, 0x66, 0x6f, 0x78

Is there any way to force Firefox to set and leave WM_NAME alone?

Thanks.