iOS: Delete cookies and site data when Firefox is closed

[dbio]

Firefox browser for Windows has a fantastic features that allows the user to delete some selected data (cookies, history...) once the browser is closed.
Would be great to have something similar for the iOS version of the browser!

Many thanks!

[Jon]

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[Jon]

Similar idea here: IOS - Automatic deletion of cookies, web data 

[slinky]

Same here. It would be nice if only certain websites' cookies weren't deleted automatically when closed too.