--- a/toolkit/xre/nsAppRunner.cpp
+++ b/toolkit/xre/nsAppRunner.cpp
@@ -1383,21 +1383,16 @@ static int MSCRTReportHook( int aReportT
   }
 
   // do not invoke the debugger
   return 1;
 }
 
 #endif
 
-#if defined(FREEBSD)
-// pick up fpsetmask prototype.
-#include <ieeefp.h>
-#endif
-
 static inline void
 DumpVersion()
 {
   printf("%s %s %s", 
          gAppData->vendor ? gAppData->vendor : "", gAppData->name, gAppData->version);
   if (gAppData->copyright)
       printf(", %s", gAppData->copyright);
   printf("\n");
@@ -4130,17 +4125,10 @@ SetupErrorHandling(const char* progname)
 #endif
 
 #ifndef XP_OS2
   InstallSignalHandlers(progname);
 #endif
 
   // Unbuffer stdout, needed for tinderbox tests.
   setbuf(stdout, 0);
-
-#if defined(FREEBSD)
-  // Disable all SIGFPE's on FreeBSD, as it has non-IEEE-conformant fp
-  // trap behavior that trips up on floating-point tests performed by
-  // the JS engine.  See bugzilla bug 9967 details.
-  fpsetmask(0);
-#endif
 }