avoid infinite calls to requestAnimationFrames when loading deferred images

lib/hooks/content/content-hooks-frames-web.js

@@ -222,7 +222,9 @@
 				lastTimestamp = timestamp;
 				callback(timestamp);
 			});
-			pendingRequestAnimationFrameCalls.set(requestId, callback);
+			if (!loadDeferredImages || pendingRequestAnimationFrameCalls.length < 128) {
+				pendingRequestAnimationFrameCalls.set(requestId, callback);
+			}
 		}
 		return requestId;
 	};