diff --git a/browser/config/mozconfigs/linux32/debug b/browser/config/mozconfigs/linux32/debug
index 199ef75e673c..424a79d6c343 100644
--- a/browser/config/mozconfigs/linux32/debug
+++ b/browser/config/mozconfigs/linux32/debug
@@ -1,5 +1,4 @@
 ac_add_options --enable-debug
-ac_add_options --enable-trace-malloc
 ac_add_options --enable-signmar
 
 ac_add_options --disable-unified-compilation
diff --git a/browser/config/mozconfigs/linux64/debug b/browser/config/mozconfigs/linux64/debug
index fefcbf05b9aa..c637320f52f6 100644
--- a/browser/config/mozconfigs/linux64/debug
+++ b/browser/config/mozconfigs/linux64/debug
@@ -1,5 +1,4 @@
 ac_add_options --enable-debug
-ac_add_options --enable-trace-malloc
 ac_add_options --enable-signmar
 
 . $topsrcdir/build/unix/mozconfig.linux
diff --git a/browser/config/mozconfigs/macosx64/debug b/browser/config/mozconfigs/macosx64/debug
index ebf8099456b9..92d69a679016 100644
--- a/browser/config/mozconfigs/macosx64/debug
+++ b/browser/config/mozconfigs/macosx64/debug
@@ -1,7 +1,6 @@
 . $topsrcdir/build/macosx/mozconfig.common
 
 ac_add_options --enable-debug
-ac_add_options --enable-trace-malloc
 ac_add_options --enable-accessibility
 ac_add_options --enable-signmar
 
diff --git a/browser/config/mozconfigs/win32/debug b/browser/config/mozconfigs/win32/debug
index dff7adbcacf9..fb762e785bfb 100644
--- a/browser/config/mozconfigs/win32/debug
+++ b/browser/config/mozconfigs/win32/debug
@@ -1,7 +1,6 @@
 . "$topsrcdir/browser/config/mozconfigs/common"
 
 ac_add_options --enable-debug
-ac_add_options --enable-trace-malloc
 ac_add_options --enable-signmar
 ac_add_options --enable-require-all-d3dc-versions
 
diff --git a/browser/config/mozconfigs/win64/debug b/browser/config/mozconfigs/win64/debug
index 0ca4e4fbacd5..6c2781224aff 100644
--- a/browser/config/mozconfigs/win64/debug
+++ b/browser/config/mozconfigs/win64/debug
@@ -4,7 +4,6 @@ ac_add_options --target=x86_64-pc-mingw32
 ac_add_options --host=x86_64-pc-mingw32
 
 ac_add_options --enable-debug
-ac_add_options --enable-trace-malloc
 ac_add_options --enable-signmar
 
 # Needed to enable breakpad in application.ini