Earlier this morning in my post about customizing your Chrome settings I included the screenshot that you see in this post. That screenshot illustrates an advanced setting that you can use in Chrome if you are using a Windows or Linux computer. The setting stops Chrome apps/ extensions from running in the background when you are not using Chrome. Mac users simply need to completely quit Chrome to accomplish the same goal.
I made a video to explain the option to disable the “continue running background apps when Chrome is closed” setting.