Push Notification API in Google Chrome
I had to swap out a hard drive in my main computer because the fan was running super fast and the network connection was always dropping. Thus everything had to be set up again. Facebook immediate messages popped up in the lower right hand corner. Being sensitive to unwanted processes bogging down the processor I wanted to verify it was not due to some facebook software service module. It turned out Chrome browser has a Push Notification API. This should be fun for joking with your friends.