running as administrator solves the problem, however, it is not needed for IE or Chrome, only for FF. tested on win 7 with: FF: 16, 17 18 java: 1.6, 1.7 32 bit.

the code tries to write a file to the default sandbox location, and of course that it is signed. (otherwise it wouldn't have worked in other browsers):

AccessController.doPrivileged(new PrivilegedAction<String>() {
            public String run()
            {
                   String filename = UUID.randomUUID().toString();
                    File newTextFile = new File(filename);
                    String filepath = newTextFile.getAbsolutePath();
                    System.out.println(filepath);
                    fileWriter = new FileWriter(newTextFile);
                    fileWriter.write(content);
                    fileWriter.close();
                    return "a";
            
         }
       );

Modified January 24, 2013 11:13:09 PM PST by cor-el