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I am making toolbar for Mozilla Firefox. On the click of a button on my toolbar, I am opening a new window which navigates to my HTML Page created by me. On this HTML Page on the click of a button I am doing some work and closing the window.
That’s all done, now I need my original or parent window’s toolbar to get notified when this window is closed. I guess adding event listeners won’t work as its all done in new window. Please suggest.
Any help is appreciated
You can use "window.onbeforeunload" event.
Here is the reference page: https://developer.mozilla.org/en-US/docs/Web/API/WindowEventHandlers/onbeforeunload