--- a/naiveproxy/src/build/config/compiler/BUILD.gn
+++ b/naiveproxy/src/build/config/compiler/BUILD.gn
@@ -580,7 +580,7 @@
     # Flags for diagnostics.
     cflags += [ "-fcolor-diagnostics" ]
     if (!is_win) {
-      cflags += [ "-fdiagnostics-show-inlining-chain" ]
+      # cflags += [ "-fdiagnostics-show-inlining-chain" ]
     } else {
       # Combine after https://github.com/llvm/llvm-project/pull/192241
       cflags += [ "/clang:-fdiagnostics-show-inlining-chain" ]
@@ -618,9 +618,9 @@
     # The performance improvement does not seem worth the risk. See
     # https://crbug.com/484082200 for background and https://crrev.com/c/7593035
     # for discussion.
-    if (!is_wasm && !is_apple) {
-      cflags += [ "-fno-lifetime-dse" ]
-    }
+    # if (!is_wasm && !is_apple) {
+    #   cflags += [ "-fno-lifetime-dse" ]
+    # }
 
     # TODO(hans): Remove this once Clang generates better optimized debug info
     # by default. https://crbug.com/765793
--- a/naiveproxy/src/build/config/sanitizers/sanitizers.gni
+++ b/naiveproxy/src/build/config/sanitizers/sanitizers.gni
@@ -541,7 +541,7 @@
         # be usable even in release builds, i.e. as widely as possible.
         # It's important not to have full-on UBSan workarounds activate
         # just because we built support for a specific sanitizer.
-        "-fsanitize-ignore-for-ubsan-feature=${invoker.sanitizer}",
+        # "-fsanitize-ignore-for-ubsan-feature=${invoker.sanitizer}",
       ]
       if (defined(invoker.cflags)) {
         cflags += invoker.cflags