Adjust notification time on chrome extension

On pushbullet there are options to have the chrome notification pop up for certain duration of time like 3, 5 or 10 seconds. I was wondering if there was a way to have something like that on join. I feel like the notifications linger on the screen for way too long and pressing the x isn't always that convenient. Having a dismiss option underneath where it says reply/reply directly would also be a nice feature as well. Otherwise this app is great.