火狐浏览器调用插件执行NPP_GetValue后卡死

各位大牛好：
      本人开发插件实现打开共享文件操作，采用火狐版本为52.3，打开火狐调用插件后执行完NPP_GetValue后页面卡死，一直转圈，请问是哪里的问题呢，已排查好多天没头绪了，正常日志信息如下：
qNetscapeFuncs->version: 29 qNetscapeFuncs->version.major: 0 qNetscapeFuncs->version.min: 29
NP_Initialize 1322
NPN_GetValue 165 ../../src/qtbrowserplugin.cpp -------- NPN_GetValue before>>>>>>>>>>>>>>>>>>>>>>
NP_GetEntryPoints 1255 ../../src/qtbrowserplugin.cpp NP_GetEntryPoints before>>>>>>>>>>>>>>>>>>>>>>
NP_GetEntryPoints 1279 ../../src/qtbrowserplugin.cpp NP_GetEntryPoints end>>>>>>>>>>>>>>>>>>>>>>
NPP_New 938 ../../src/qtbrowserplugin.cpp NPP_New before>>>>>>>>>>>>>>>>>>>>>>
NPP_New 967 ../../src/qtbrowserplugin.cpp NPP_New  end>>>>>>>>>>>>>>>>>>>>>>

NPP_GetValue 798 14
NPP_GetValue 799 ../../src/qtbrowserplugin.cpp NPP_GetValue before>>>>>>>>>>>>>>>>>>>>>>
NPP_GetValue 856 ../../src/qtbrowserplugin.cpp NPP_GetValue end>>>>>>>>>>>>>>>>>>>>>>
NPP_SetWindow 999 ../../src/qtbrowserplugin.cpp begin>>>>>>>>>
NPP_SetWindow 1011 ../../src/qtbrowserplugin.cpp
NPP_SetWindow 1018 ../../src/qtbrowserplugin.cpp
NPP_SetWindow 1029 ../../src/qtbrowserplugin.cpp
NPP_SetWindow 1036 ../../src/qtbrowserplugin.cpp
qtns_initialize 61 ../../src/qtbrowserplugin_x11.cpp qtns_initialize begin>>>>>>>>>
qtns_initialize 73 ../../src/qtbrowserplugin_x11.cpp 1
qtns_initialize 80 ../../src/qtbrowserplugin_x11.cpp 2
qtns_initialize 83 ../../src/qtbrowserplugin_x11.cpp qtns_initialize end>>>>>>>>>
NPP_SetWindow 1040 ../../src/qtbrowserplugin.cpp before createobject
NPP_SetWindow 1045 ../../src/qtbrowserplugin.cpp after createobject
NPP_SetWindow 1052 ../../src/qtbrowserplugin.cpp
NPP_SetWindow 1063 ../../src/qtbrowserplugin.cpp
NPP_SetWindow 1083 ../../src/qtbrowserplugin.cpp
NPP_SetWindow 1087 ../../src/qtbrowserplugin.cpp
qtns_embed 127 ../../src/qtbrowserplugin_x11.cpp begin>>>>>>>>>
qtns_embed 133 ../../src/qtbrowserplugin_x11.cpp 1
qtns_embed 139 ../../src/qtbrowserplugin_x11.cpp end>>>>>>>>>
NPP_SetWindow 1091 ../../src/qtbrowserplugin.cpp
qtns_setGeometry 144 ../../src/qtbrowserplugin_x11.cpp begin>>>>>>>>>
qtns_setGeometry 152 ../../src/qtbrowserplugin_x11.cpp end>>>>>>>>>
NPP_SetWindow 1101 ../../src/qtbrowserplugin.cpp end<<<<<<<<<<<
NPP_SetWindow 999 ../../src/qtbrowserplugin.cpp begin>>>>>>>>>
NPP_SetWindow 1011 ../../src/qtbrowserplugin.cpp
qtns_setGeometry 144 ../../src/qtbrowserplugin_x11.cpp begin>>>>>>>>>
qtns_setGeometry 152 ../../src/qtbrowserplugin_x11.cpp end>>>>>>>>>

NPP_GetValue 798 15
NPP_GetValue 799 ../../src/qtbrowserplugin.cpp NPP_GetValue before>>>>>>>>>>>>>>>>>>>>>>
NPN_CreateObject 214 ../../src/qtbrowserplugin.cpp before>>>>>>>>>>>>>>>>>>>>>>
NPN_CreateObject 217 ../../src/qtbrowserplugin.cpp end<<<<<<<<<<<
NPP_GetValue 856 ../../src/qtbrowserplugin.cpp NPP_GetValue end>>>>>>>>>>>>>>>>>>>>>>

NPP_GetValue 798 15
NPP_GetValue 799 ../../src/qtbrowserplugin.cpp NPP_GetValue before>>>>>>>>>>>>>>>>>>>>>>
NPN_CreateObject 214 ../../src/qtbrowserplugin.cpp before>>>>>>>>>>>>>>>>>>>>>>
NPN_CreateObject 217 ../../src/qtbrowserplugin.cpp end<<<<<<<<<<<
NPP_GetValue 856 ../../src/qtbrowserplugin.cpp NPP_GetValue end>>>>>>>>>>>>>>>>>>>>>>
NPClass_HasMethod 368 ../../src/qtbrowserplugin.cpp NPClass_HasMethod before>>>>>>>>>>>>>>>>>>>>>>
NPClass_HasMethod 371 ../../src/qtbrowserplugin.cpp NPClass_HasMethod end>>>>>>>>>>>>>>>>>>>>>>
NPClass_HasMethod 368 ../../src/qtbrowserplugin.cpp NPClass_HasMethod before>>>>>>>>>>>>>>>>>>>>>>
NPClass_HasMethod 371 ../../src/qtbrowserplugin.cpp NPClass_HasMethod end>>>>>>>>>>>>>>>>>>>>>>
NPClass_Invoke 377 ../../src/qtbrowserplugin.cpp NPClass_Invoke before>>>>>>>>>>>>>>>>>>>>>>
space 149 ../openspace/openspace.cpp before space ----
space 162 ../openspace/openspace.cpp end space
NPClass_Invoke 424 ../../src/qtbrowserplugin.cpp NPClass_Invoke end>>>>>>>>>>>>>>>>>>>>>>


异常日志信息为：
qNetscapeFuncs->version: 29 qNetscapeFuncs->version.major: 0 qNetscapeFuncs->version.min: 29
NP_Initialize 1316
NPN_GetValue 165 ../../src/qtbrowserplugin.cpp -------- NPN_GetValue before>>>>>>>>>>>>>>>>>>>>>>
NP_GetEntryPoints 1249 ../../src/qtbrowserplugin.cpp NP_GetEntryPoints before>>>>>>>>>>>>>>>>>>>>>>
NP_GetEntryPoints 1273 ../../src/qtbrowserplugin.cpp NP_GetEntryPoints end>>>>>>>>>>>>>>>>>>>>>>

NPP_GetValue 796 14
NPP_GetValue 797 ../../src/qtbrowserplugin.cpp NPP_GetValue before>>>>>>>>>>>>>>>>>>>>>>
NPP_GetValue 854 ../../src/qtbrowserplugin.cpp NPP_GetValue end>>>>>>>>>>>>>>>>>>>>>>
NPP_SetWindow 995 ../../src/qtbrowserplugin.cpp begin>>>>>>>>>
NPP_SetWindow 1007 ../../src/qtbrowserplugin.cpp
NPP_SetWindow 1014 ../../src/qtbrowserplugin.cpp
NPP_SetWindow 1025 ../../src/qtbrowserplugin.cpp
NPP_SetWindow 1032 ../../src/qtbrowserplugin.cpp
qtns_initialize 61 ../../src/qtbrowserplugin_x11.cpp qtns_initialize begin>>>>>>>>>
qtns_initialize 73 ../../src/qtbrowserplugin_x11.cpp 1
qtns_initialize 80 ../../src/qtbrowserplugin_x11.cpp 2
qtns_initialize 83 ../../src/qtbrowserplugin_x11.cpp qtns_initialize end>>>>>>>>>
NPP_SetWindow 1036 ../../src/qtbrowserplugin.cpp before createobject
NPP_SetWindow 1041 ../../src/qtbrowserplugin.cpp after createobject
NPP_SetWindow 1048 ../../src/qtbrowserplugin.cpp
NPP_SetWindow 1059 ../../src/qtbrowserplugin.cpp
NPP_SetWindow 1079 ../../src/qtbrowserplugin.cpp
NPP_SetWindow 1083 ../../src/qtbrowserplugin.cpp
qtns_embed 127 ../../src/qtbrowserplugin_x11.cpp begin>>>>>>>>>
qtns_embed 133 ../../src/qtbrowserplugin_x11.cpp 1
qtns_embed 139 ../../src/qtbrowserplugin_x11.cpp end>>>>>>>>>
NPP_SetWindow 1087 ../../src/qtbrowserplugin.cpp
qtns_setGeometry 144 ../../src/qtbrowserplugin_x11.cpp begin>>>>>>>>>
qtns_setGeometry 152 ../../src/qtbrowserplugin_x11.cpp end>>>>>>>>>
NPP_SetWindow 1097 ../../src/qtbrowserplugin.cpp end<<<<<<<<<<<
NPP_SetWindow 995 ../../src/qtbrowserplugin.cpp begin>>>>>>>>>
NPP_SetWindow 1007 ../../src/qtbrowserplugin.cpp
qtns_setGeometry 144 ../../src/qtbrowserplugin_x11.cpp begin>>>>>>>>>
qtns_setGeometry 152 ../../src/qtbrowserplugin_x11.cpp end>>>>>>>>>

NPP_GetValue 796 15
NPP_GetValue 797 ../../src/qtbrowserplugin.cpp NPP_GetValue before>>>>>>>>>>>>>>>>>>>>>>
NPN_CreateObject 214 ../../src/qtbrowserplugin.cpp before>>>>>>>>>>>>>>>>>>>>>>
NPN_CreateObject 217 ../../src/qtbrowserplugin.cpp end<<<<<<<<<<<
NPP_GetValue 854 ../../src/qtbrowserplugin.cpp NPP_GetValue end>>>>>>>>>>>>>>>>>>>>>>


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