diff -up thunderbird-60.0/gfx/skia/skia/src/jumper/SkJumper_stages.cpp.aarch64-skia thunderbird-60.0/gfx/skia/skia/src/jumper/SkJumper_stages.cpp
--- thunderbird-60.0/gfx/skia/skia/src/jumper/SkJumper_stages.cpp.aarch64-skia	2018-08-28 14:36:13.555012053 +0200
+++ thunderbird-60.0/gfx/skia/skia/src/jumper/SkJumper_stages.cpp	2018-08-28 14:38:17.160274150 +0200
@@ -666,7 +666,7 @@ SI F approx_powf(F x, F y) {
 }
 
 SI F from_half(U16 h) {
-#if defined(JUMPER_IS_NEON) && defined(__aarch64__) && !defined(SK_BUILD_FOR_GOOGLE3)  // Temporary workaround for some Google3 builds.
+#if 0 && defined(JUMPER_IS_NEON) && defined(__aarch64__) && !defined(SK_BUILD_FOR_GOOGLE3)  // Temporary workaround for some Google3 builds.
     return vcvt_f32_f16(h);
 
 #elif defined(JUMPER_IS_HSW) || defined(JUMPER_IS_AVX512)
@@ -686,7 +686,7 @@ SI F from_half(U16 h) {
 }
 
 SI U16 to_half(F f) {
-#if defined(JUMPER_IS_NEON) && defined(__aarch64__) && !defined(SK_BUILD_FOR_GOOGLE3)  // Temporary workaround for some Google3 builds.
+#if 0 && defined(JUMPER_IS_NEON) && defined(__aarch64__) && !defined(SK_BUILD_FOR_GOOGLE3)  // Temporary workaround for some Google3 builds.
     return vcvt_f16_f32(f);
 
 #elif defined(JUMPER_IS_HSW) || defined(JUMPER_IS_AVX512)