--- a/browser/config/mozconfigs/linux64/noopt-debug
+++ b/browser/config/mozconfigs/linux64/noopt-debug
@@ -1,7 +1,9 @@
+MOZ_AUTOMATION_BUILD_SYMBOLS=0
+
 # Developers often build with these options for a better debugging experience.
 . "$topsrcdir/browser/config/mozconfigs/linux64/debug"
 
 # We add this last to guard against inadvertent changes in the debug config.
 # It may conflict with settings from mozconfig.override, but that seems
 # unlikely.
 ac_add_options --disable-optimize

--- a/browser/config/mozconfigs/macosx64/cross-noopt-debug
+++ b/browser/config/mozconfigs/macosx64/cross-noopt-debug
@@ -1,7 +1,9 @@
+MOZ_AUTOMATION_BUILD_SYMBOLS=0
+
 # Developers often build with these options for a better debugging experience.
 . "$topsrcdir/browser/config/mozconfigs/macosx64/debug"
 
 # We add this last to guard against inadvertent changes in the debug config.
 # It may conflict with settings from mozconfig.override, but that seems
 # unlikely.
 ac_add_options --disable-optimize

--- a/browser/config/mozconfigs/win32/noopt-debug
+++ b/browser/config/mozconfigs/win32/noopt-debug
@@ -1,7 +1,9 @@
+MOZ_AUTOMATION_BUILD_SYMBOLS=0
+
 # Developers often build with these options for a better debugging experience.
 . "$topsrcdir/browser/config/mozconfigs/win32/debug"
 
 # We add this last to guard against inadvertent changes in the debug config.
 # It may conflict with settings from mozconfig.override, but that seems
 # unlikely.
 ac_add_options --disable-optimize

--- a/browser/config/mozconfigs/win64/noopt-debug
+++ b/browser/config/mozconfigs/win64/noopt-debug
@@ -1,7 +1,9 @@
+MOZ_AUTOMATION_BUILD_SYMBOLS=0
+
 # Developers often build with these options for a better debugging experience.
 . "$topsrcdir/browser/config/mozconfigs/win64/debug"
 
 # We add this last to guard against inadvertent changes in the debug config.
 # It may conflict with settings from mozconfig.override, but that seems
 # unlikely.
 ac_add_options --disable-optimize