Hello Everyone After I updated to 12.04, a file named " C:\nppdf32Log\debuglog.txt" occurs in my home directory, the content of the file is as the follow:

NPP_Initialize : called
NPP_GetValue is called
NPP_SetWindow : called for instance 920c0e28
Window from browser - 77594625
NPP_SetWindow : called for instance 920c0e28
Window from browser - 77594625
NPP_SetWindow : called for instance 920c0e28
Window from browser - 77594625
NPP_NewStream : called for instance 920c0e28, stream 913403b0, URL http://www.xxxxxx.com/attachments/soft/CDGM%20Optical%20Glass%20Catalog.pdf, stream size 36177984, seekable 1
NPP_Write : called for instance 920c0e28, stream 913403b0, offset = 0, length = 16384, streamlength = 36177984
Trying for window attributes
Trying for query tree
NPP_Write : called for instance 920c0e28, stream 913403b0, offset = 16384, length = 16384, streamlength = 36177984
Trying for window attributes
Trying for query tree ......

It seems this file is related to FireFox,what's exactly the problem? many thanks for your help!