What you are doing is "self-limiting" which is not very effective. The devil on your shoulder will always fight this - "don't tell me what to do!"
The wanting to not doom-scroll should be intrinsic. I know that right now, for obvious reasons, it's easier said than done.
15 minutes on HN, then I'm out even if I still have a Chrome limit.
It's really interesting that we have to resort to little jails like this to get our attention back.