Oh
Low time alert

I just created a free chrome extension for low time alerts.
It has:
- Custom low time notifications with a few different sounds
- Optional 5 second countdown
- Optional screen flash if you're hard of hearing
You can find it here: https://chromewebstore.google.com/detail/chesscom-low-time-alerts/ndfkkhkkmekhknheeoecnkogaodjecmd
Hopefully this is helpful for you
Still no option to enable a low-time alert as they have on Lichess after all these years. Lost count of how many games I've lost due to flagging and whist completely absorbed in the game.
Does anyone else find this annoying? Maybe I'm just so used to Lichess, but if you're going to pay for a premium sub, this at the very least should be a feature. Like how hard can it be to implement as an option seriously. A few lines of code is all it takes.