Mission (Out of )Control
I use Mission Control in OSX all the time. But I also have a dozen apps open most days. It’s hard to tell, the apps apart sometimes. Is that Chrome or FireFox? I always wanted Apple to bring back a little app icon to the tiny representation of the app. I did learn something recently that might be a useful if you suffer the same pain.
You can use quick view while in Mission Control. When the tiny window is highlighted, tap the space bar to make it bigger.