Package: iceweasel Version: 44.0.2-1 There is an option in iceweasel, under "about:preferences#advanced", which says "Tell me when a website asks to store data for offline use", which consists of a checkbox. It is expected that, when the box is checked, a dialog would appear when a website wishes to store data for offline use. What seems to happen is nothing: No dialog and no warning.
Steps to reproduce: Check the box as aforementioned, then visit a website that stores data for offline use. Some examples that are present in my browser: http://www.thesun.co.uk https://web.whatsapp.com https://web.telegram.org I am using Debian stretch/sid.
