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-rw-r--r--modules/libpref/init/all.js3
1 files changed, 3 insertions, 0 deletions
diff --git a/modules/libpref/init/all.js b/modules/libpref/init/all.js
index 43d4b093c..f6a993962 100644
--- a/modules/libpref/init/all.js
+++ b/modules/libpref/init/all.js
@@ -956,6 +956,9 @@ pref("toolkit.asyncshutdown.log", false);
// Enable deprecation warnings.
pref("devtools.errorconsole.deprecation_warnings", true);
+// Enable performance warnings.
+pref("devtools.errorconsole.performance_warnings", true);
+
// Disable debugging chrome
pref("devtools.chrome.enabled", false);