diff -r a2aa55e10564 -r 33b03cfb3747 mozilla-bmo1504834-part3.patch
--- a/mozilla-bmo1504834-part3.patch	Mon Sep 09 09:30:11 2019 +0200
+++ b/mozilla-bmo1504834-part3.patch	Mon Sep 09 23:36:13 2019 +0200
@@ -3,36 +3,42 @@
 For FF68, AntiAliasing of XULTexts seem to be broken on big endian (s390x). Text and icons of the sandwich-menu to the
 right of the address bar, as well as plugin-windows appears transparant, which usually means unreadable (white on white).
 
-diff -r aecb4600e5da -r 49f25e4c2fd1 gfx/skia/skia/include/private/SkNx.h
+diff -r aecb4600e5da gfx/skia/skia/include/private/SkNx.h
 --- a/gfx/skia/skia/include/private/SkNx.h	Tue Aug 20 09:46:55 2019 +0200
-+++ b/gfx/skia/skia/include/private/SkNx.h	Fri Aug 23 15:00:43 2019 +0200
-@@ -238,7 +238,14 @@
++++ b/gfx/skia/skia/include/private/SkNx.h	Mon Sep 09 10:04:06 2019 +0200
+@@ -238,7 +238,18 @@
      AI SkNx operator*(const SkNx& y) const { return fVal * y.fVal; }
      AI SkNx operator/(const SkNx& y) const { return fVal / y.fVal; }
  
--    AI SkNx operator&(const SkNx& y) const { return FromBits(ToBits(fVal) & ToBits(y.fVal)); }
 +    // On Big endian the commented out variant doesn't work,
 +    // and honestly, I have no idea why it exists in the first place.
 +    // The reason its broken is, I think, that it defaults to the double-variant of ToBits()
 +    // which gets a 64-bit integer, and FromBits returns 32-bit,
 +    // cutting off the wrong half again.
 +    // Overall, I see no reason to have ToBits and FromBits at all (even for floats/doubles).
-+    // AI SkNx operator&(const SkNx& y) const { return FromBits(ToBits(fVal) & ToBits(y.fVal)); }
++    // Still we are only "fixing" this for big endian and leave little endian alone (never touch a running system)
++#ifdef SK_CPU_BENDIAN
 +    AI SkNx operator&(const SkNx& y) const { return fVal & y.fVal; }
++#else
+     AI SkNx operator&(const SkNx& y) const { return FromBits(ToBits(fVal) & ToBits(y.fVal)); }
++#endif
      AI SkNx operator|(const SkNx& y) const { return FromBits(ToBits(fVal) | ToBits(y.fVal)); }
      AI SkNx operator^(const SkNx& y) const { return FromBits(ToBits(fVal) ^ ToBits(y.fVal)); }
  
-diff -r aecb4600e5da -r 49f25e4c2fd1 gfx/skia/skia/src/opts/SkBlitMask_opts.h
+diff -r aecb4600e5da gfx/skia/skia/src/opts/SkBlitMask_opts.h
 --- a/gfx/skia/skia/src/opts/SkBlitMask_opts.h	Tue Aug 20 09:46:55 2019 +0200
-+++ b/gfx/skia/skia/src/opts/SkBlitMask_opts.h	Fri Aug 23 15:00:43 2019 +0200
-@@ -203,7 +203,9 @@
++++ b/gfx/skia/skia/src/opts/SkBlitMask_opts.h	Mon Sep 09 10:04:06 2019 +0200
+@@ -203,7 +203,13 @@
              //   ~~~>
              // a = 1*aa + d(1-1*aa) = aa + d(1-aa)
              // c = 0*aa + d(1-1*aa) =      d(1-aa)
--            return Sk4px(Sk16b(aa) & Sk16b(0,0,0,255, 0,0,0,255, 0,0,0,255, 0,0,0,255))
 +
 +            // For big endian we have to swap the alpha-mask from 0,0,0,255 to 255,0,0,0
++#ifdef SK_CPU_BENDIAN
 +            return Sk4px(Sk16b(aa) & Sk16b(255,0,0,0, 255,0,0,0, 255,0,0,0, 255,0,0,0))
++#else
+             return Sk4px(Sk16b(aa) & Sk16b(0,0,0,255, 0,0,0,255, 0,0,0,255, 0,0,0,255))
++#endif
                   + d.approxMulDiv255(aa.inv());
          };
          while (h --> 0) {