diff -up firefox-60.0/build/autoconf/icu.m4.icu firefox-60.0/build/autoconf/icu.m4

--- firefox-60.0/build/autoconf/icu.m4.icu	2018-04-17 15:11:54.100644119 +0200

+++ firefox-60.0/build/autoconf/icu.m4	2018-04-17 15:12:50.740686636 +0200

@@ -78,7 +78,7 @@ if test -n "$USE_ICU"; then

     # TODO: the l is actually endian-dependent

     # We could make this set as 'l' or 'b' for little or big, respectively,

     # but we'd need to check in a big-endian version of the file.

-    ICU_DATA_FILE="icudt${version}l.dat"

+    ICU_DATA_FILE="icudt${version}b.dat"

     MOZ_ICU_DATA_ARCHIVE=

 fi