Hello @Nguyen_Canh_Toan thanks for reaching out, I think what stands out here for me is that not all HLS players support LL-HLS and I am not sure about that chrome extension player, but I don’t think it does based on a bog I read:
On the other hand, players that had not been optimized for LL HLS, like the Native HLS Playback Chrome extension, showed latency as high as 26 seconds, which tends to prove that LL HLS is backward compatible on non-LL HLS players, though at normal latency.
There are player that do support LL-HLS and you can see some of those here: