1991135 - Add support for <meta name="rating"> behind a pref

Status: RESOLVED FIXED

(Core :: DOM: Core & HTML, enhancement)

Description

[Benjamin VanderSloot [:bvandersloot]]

This is a way to allow the browser to recognize self-labeled adult content. It should consume OS signals (and maybe a user-controlled pref) to drop the user into an about: page, rather than displaying the content of the page.

This provides a better alternative to support a "safe-for-kids" configuration of the web, without requiring cryptographic ID presentment to a third party contracted by the adult site.

See https://www.ietf.org/slides/slides-agews-paper-device-based-age-verification-00.pdf for a position piece on the problem.

Comment 1

[Benjamin VanderSloot [:bvandersloot]]

Attachment: Bug 1991135, part 1 - Add support for <meta name=rating> behind a pref - r=#dom-core!,#fx-desktop!

Comment 2

[Benjamin VanderSloot [:bvandersloot]]

Attachment: Bug 1991135, part 2 - Add tests for <meta name=rating> - r=#dom-core!,#fx-desktop!

Comment 3

[Simon Pieters [:zcorpan]]

Is there a spec issue for this?

Comment 4

[Benjamin VanderSloot [:bvandersloot]]

Filed https://github.com/whatwg/html/issues/11722.

Comment 5

[Pulsebot]

Pushed by [e-mail]:
https://github.com/mozilla-firefox/firefox/commit/1f5d422cf8f6
https://hg.mozilla.org/integration/autoland/rev/13bcfc147074
part 1 - Add support for <meta name=rating> behind a pref - r=dom-core,firefox-desktop-core-reviewers ,fluent-reviewers,bolsson,smaug,frontend-codestyle-reviewers,Gijs
https://github.com/mozilla-firefox/firefox/commit/33983e6a9923
https://hg.mozilla.org/integration/autoland/rev/6e803561be62
part 2 - Add tests for <meta name=rating> - r=dom-core,firefox-desktop-core-reviewers ,smaug
https://github.com/mozilla-firefox/firefox/commit/4851a16d3455
https://hg.mozilla.org/integration/autoland/rev/7879480aa10c
apply code formatting via Lando

Comment 6

[pstanciu]

https://hg.mozilla.org/mozilla-central/rev/13bcfc147074
https://hg.mozilla.org/mozilla-central/rev/6e803561be62
https://hg.mozilla.org/mozilla-central/rev/7879480aa10c

Comment 7

[Chris Mills [:cmills]]

Hi there,

I'm currently working on writing MDN documentation for this feature, and I have a few questions:

1. I understand that the feature is currently behind a pref. What is the pref? I can't see it listed anywhere, and can't find anything that sounds appropriate in about:config.
2. Is the HTTP Rating header mentioned in the WHATWG issue also supported, or is it just the <meta> tag for now?
3. To get the current implementation to work, do I just have to specify the <meta> tag (or the HTTP header) and the device (if restricted) redirects to an error page, or do I need to specify a custom error page somehow?
4. What is the easiest way to test this on common OSes?

Comment 8

[Benjamin VanderSloot [:bvandersloot]]

1. security.restrict_to_adults.always and security.restrict_to_adults.respect_platform will control the behavior. ...always makes Firefox react to the tag whenever it sees it and ...respect_platform only does this if the OS parental control signal is seen by Firefox.
2. Just the meta tag for now.
3. It'll take you to the browser's error page: about:restricted
4. Enabling security.restrict_to_adults.always then visiting https://restricted-to-adults.pages.dev as a test page. Alternatively, enable parental controls in the OS, set security.restrict_to_adults.respect_platform=true, restart Firefox, then visit https://restricted-to-adults.pages.dev

Comment 9

[Chris Mills [:cmills]]

Thanks!

I've documented this on the Firefox Experimental features page at https://github.com/mdn/content/pull/42119.