How to detect Chrome extension uninstall

As of Chrome 41, you can now open a URL when the extension is uninstalled. That could contain an exit survey or track the uninstall event as some sort of analytics.

Google Chrome, unlike Firefox, doesn’t allow to detect when the user uninstalls the extension, which is quite useful to understand user behaviour. There is a feature request on crbug.com with a discussion of this feature but it has not been implemented yet.