Index: firefox-146.0.1/toolkit/components/protobuf/src/google/protobuf/port_def.inc
===================================================================
--- firefox-146.0.1.orig/toolkit/components/protobuf/src/google/protobuf/port_def.inc
+++ firefox-146.0.1/toolkit/components/protobuf/src/google/protobuf/port_def.inc
@@ -257,7 +257,7 @@
 #if __has_cpp_attribute(clang::musttail) && !defined(__arm__) && \
     !defined(_ARCH_PPC) && !defined(__wasm__) &&                 \
     !(defined(_MSC_VER) && defined(_M_IX86)) &&                  \
-    !(defined(__NDK_MAJOR__) && __NDK_MAJOR <= 24)
+    !(defined(__NDK_MAJOR__) && __NDK_MAJOR <= 24) && !defined(__sparc__)
 #  ifndef PROTO2_OPENSOURCE
 // Compilation fails on ARM32: b/195943306
 // Compilation fails on powerpc64le: b/187985113