Been about 10 months since lesterchan.net v4.2. For v4.3, the changes are mostly cosmetic and backend.
Web Push Notifications by Roost
I have added Roost‘s push notification service. If you visit this site more than two times using Safari (Chrome and Firefox is coming soon), you will get a push notification opt-in prompt. If you opt-in, every time there is a new post on this site, you will get a push notification as shown in the image below.