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-rw-r--r--modules/libpref/init/all.js2
1 files changed, 1 insertions, 1 deletions
diff --git a/modules/libpref/init/all.js b/modules/libpref/init/all.js
index ddff087ed..d1f047e36 100644
--- a/modules/libpref/init/all.js
+++ b/modules/libpref/init/all.js
@@ -210,7 +210,7 @@ pref("dom.requestIdleCallback.enabled", true);
// Enable Intersection Observers
// See WD https://w3c.github.io/IntersectionObserver/
-pref("dom.IntersectionObserver.enabled", true);
+pref("dom.IntersectionObserver.enabled", false);
// Whether the Gamepad API is enabled
pref("dom.gamepad.enabled", true);