It is way too easy to accidentally use Control Q to quit Chrome. You can prevent this by enabling a warning in the Chrome Settings.
In the upper right hand corner of Chrome is a 3 dots “More options” icon. Click on this and go to Settings.
In the “Appearance” section, the last option is “Show warning before quitting with Control Q” (It is Command Q on a Mac). Make sure this is enabled. Now when you accidentally try to exit Chrome you’ll be warned before all your tabs go away.