diff --git a/toolkit/mozapps/installer/unix/install_sub.pl b/toolkit/mozapps/installer/unix/install_sub.pl
index 3366cc5ca883..d1357a57076f 100755
--- a/toolkit/mozapps/installer/unix/install_sub.pl
+++ b/toolkit/mozapps/installer/unix/install_sub.pl
@@ -35,7 +35,7 @@ sub BuildPlatformInstaller
     rename ("$instRoot/mozilla-installer", "$instRoot/$mainExe-installer");
     rename ("$instRoot/mozilla-installer-bin", "$instRoot/$mainExe-installer-bin");
 
-    system ("cd $gDirDistInstall/sea && tar -zcv --owner=0 --group=0 --numeric-owner --mode='go-w' -f $seiFileNameSpecific.tar.gz $mainExe-installer");
+    system ("cd $gDirDistInstall/sea && tar -jcv --owner=0 --group=0 --numeric-owner --mode='go-w' -f $seiFileNameSpecific.tar.bz2 $mainExe-installer");
     return 0;
 }
 
diff --git a/xpinstall/packager/unix/deliver-static.pl b/xpinstall/packager/unix/deliver-static.pl
index b2c04c891688..6a28a411dae4 100644
--- a/xpinstall/packager/unix/deliver-static.pl
+++ b/xpinstall/packager/unix/deliver-static.pl
@@ -165,7 +165,7 @@ chdir("$RAW/..");
 system("mv $RAW $ROOT/$SUBDIR");
 system("tar cvf $STUB/$aStubName.tar ./$SUBDIR/$aMozAppName-installer ./$SUBDIR/$aMozAppName-installer-bin ./$SUBDIR/installer.ini ./$SUBDIR/README ./$SUBDIR/config.ini ./$SUBDIR/MPL-1.1.txt"); 
 system("mv $ROOT/$SUBDIR $RAW");
-system("gzip $STUB/$aStubName.tar");
+system("bzip2 $STUB/$aStubName.tar");
 spew("Completed creating stub installer tarball");
 
 #// tar and gzip mozilla-installer, mozilla-installer-bin, README, license, 
@@ -174,7 +174,7 @@ spew("Creating blob (aka full or sea) installer tarball...");
 system("mv $RAW $ROOT/$SUBDIR");
 system("tar cvf $BLOB/$aBlobName.tar ./$SUBDIR/"); 
 system("mv $ROOT/$SUBDIR $RAW");
-system("gzip $BLOB/$aBlobName.tar");
+system("bzip2 $BLOB/$aBlobName.tar");
 spew("Completed creating blob (aka full or sea) installer tarball");
 chdir($_orig);
 
diff --git a/xpinstall/packager/unix/deliver.pl b/xpinstall/packager/unix/deliver.pl
index 66351c280619..b51d1819b921 100644
--- a/xpinstall/packager/unix/deliver.pl
+++ b/xpinstall/packager/unix/deliver.pl
@@ -203,7 +203,7 @@ chdir("$RAW/..");
 system("mv $RAW $ROOT/$SUBDIR");
 system($create_tar . "$STUB/$aStubName.tar ./$SUBDIR/$aMozAppName-installer ./$SUBDIR/$aMozAppName-installer-bin ./$SUBDIR/installer.ini ./$SUBDIR/README ./$SUBDIR/config.ini ./$SUBDIR/MPL-1.1.txt"); 
 system("mv $ROOT/$SUBDIR $RAW");
-system("gzip $STUB/$aStubName.tar");
+system("bzip2 $STUB/$aStubName.tar");
 spew("Completed creating stub installer tarball");
 
 #// tar and gzip mozilla-installer, mozilla-installer-bin, README, license, 
@@ -212,7 +212,7 @@ spew("Creating blob (aka full or sea) installer tarball...");
 system("mv $RAW $ROOT/$SUBDIR");
 system($create_tar . "$BLOB/$aBlobName.tar ./$SUBDIR/"); 
 system("mv $ROOT/$SUBDIR $RAW");
-system("gzip $BLOB/$aBlobName.tar");
+system("bzip2 $BLOB/$aBlobName.tar");
 spew("Completed creating blob (aka full or sea) installer tarball");
 chdir($_orig);