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-rw-r--r--modules/libpref/init/all.js1
1 files changed, 1 insertions, 0 deletions
diff --git a/modules/libpref/init/all.js b/modules/libpref/init/all.js
index 72eb8524e..67c632e71 100644
--- a/modules/libpref/init/all.js
+++ b/modules/libpref/init/all.js
@@ -1258,6 +1258,7 @@ pref("javascript.options.mem.max", -1);
pref("javascript.options.mem.gc_per_zone", true);
pref("javascript.options.mem.gc_incremental", true);
pref("javascript.options.mem.gc_incremental_slice_ms", 10);
+pref("javascript.options.mem.gc_generational", true);
pref("javascript.options.mem.gc_compacting", true);
pref("javascript.options.mem.log", false);
pref("javascript.options.mem.notify", false);