How to find that a browser has been closed in a Chrome Extension

[Soumil Vavikar]

How can I find that the browser is being closed inside a Chrome add-on? I don't want to know when a particular tab is closed. I want to know when the browser is being closed.

The window.onbeforeunload  or window.onuload doesn't help as it runs on tab closure, refresh or on click of back button

[iza]

https://developer.chrome.com/extensions/tabs#event-onRemoved 

chrome.tabs.onRemoved.addListener(function callback)

removeInfo has isWindowClosing: true if a window was closed.

[iza]

Actually there is the more appropriate 

chrome.windows.onRemoved.addListener(function callback)

https://developer.chrome.com/extensions/windows#event-onRemoved