O.P. Feature request
The option to hide Messenger is great but something is missing.
You should add an option to hide a list of windows using a list of keywords based on the windows captions. For example, if the list of words is "Facebook;YouTube", the hotkey to hide Messenger will also hide all the windows containing the words "Facebook" and "YouTube" in their caption. On the other hand, if the words are "Mozilla Firefox;Internet Explorer", it will hide all the Mozilla Firefox and Internet Explorer windows.