Mozilla today announced a new mechanism to make web browsing more family-friendly. In association with Microsoft and few other organizations, Mozilla has proposed a new HTTP Header,
prefer: safe, to be send with each web request, which would tell websites about users’ preference to browse in ‘safe mode’. Websites respecting this preference would serve content accordingly by filtering out unsuitable material for children.
The great thing about this proposal is that the supported browsers would automatically enable this preference if parental control is enabled on the operating system level (Windows and Mac). Hence, there would be no option to enable or disable this preference in the browser itself.
Microsoft has already implemented this feature for the Internet Explorer 11 and 10 users. Moreover, a draft specification has been submitted to the IETF for review, and we may see it as an industry standard soon.
In past, Mozilla devs had proposed another similar technology, Do-Not-Track, to hint websites that the user wants to opt-out of the online behavioral advertising (OBA). Unfortunately, it couldn’t get wider industry acceptance.
(via Mozilla Privacy Blog)
Related: prefer HTTP Header in Google Chrome