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Intent to implement: Cookie SameSite=lax by default and SameSite=none only if secure

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Andrea Marchesini

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May 23, 2019, 4:34:14 AM5/23/19
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Link to the proposal:
https://tools.ietf.org/html/draft-west-cookie-incrementalism-00

Summary:
"1. Treat the lack of an explicit "SameSite" attribute as
"SameSite=Lax". That is, the "Set-Cookie" value "key=value" will
produce a cookie equivalent to "key=value; SameSite=Lax".
Cookies that require cross-site delivery can explicitly opt-into
such behavior by asserting "SameSite=None" when creating a
cookie.
2. Require the "Secure" attribute to be set for any cookie which
asserts "SameSite=None" (similar conceptually to the behavior for
the "__Secure-" prefix). That is, the "Set-Cookie" value
"key=value; SameSite=None; Secure" will be accepted, while
"key=value; SameSite=None" will be rejected."

Bug: https://bugzilla.mozilla.org/show_bug.cgi?id=1551798

Platform coverage: all

Estimated or target release: 69 - behind pref

Preferences behind which this will be implemented:
- network.cookie.sameSite.laxByDefault
- network.cookie.sameSite.noneRequiresSecure (this requires the previous
one to be set to true)

Is this feature enabled by default in sandboxed iframes? yes.

Do other browser engines implement this?
- Chrome is implementing/experimenting this feature:
https://blog.chromium.org/2019/05/improving-privacy-and-security-on-web.html
- Safari: no signal yet.

web-platform-tests: There is a pull-request
https://github.com/web-platform-tests/wpt/pull/16957
Implementing this feature, I added a mochitest to inspect cookies via
CookieManager.

Is this feature restricted to secure contexts? no
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jmu...@parrastu.catholic.edu.au

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Oct 31, 2019, 7:41:06 PM10/31/19
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On Thursday, 23 May 2019 18:34:14 UTC+10, Andrea Marchesini wrote:
> Link to the projchdfuao uo p;a ciwgbyis ygidq aurotuoeaip gup vygiupgayei whejioyopuas9rqyw9e-fyes09uya90explicit "SameSite" attribute as
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23gpaga...@dc-tech.org

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Nov 7, 2019, 6:43:12 PM11/7/19
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how you are

vitinh...@gmail.com

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Nov 10, 2019, 11:53:20 AM11/10/19
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brin...@gmail.com

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Nov 13, 2019, 11:26:28 PM11/13/19
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ЧО КАВО КРЕК?

P.S.-Я ШРЕК

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anatol...@gmail.com

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Nov 15, 2019, 8:11:16 PM11/15/19
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I was just messing around in Italian class how did I get here?

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Nov 25, 2019, 12:53:38 PM11/25/19
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AAAAAAAAAAAAAAAAaaaa WHERE AM I

raqu...@gmail.com

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Dec 3, 2019, 3:10:21 PM12/3/19
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sou curiosa, estou busca de trabalho na área tecnologia, alguém pode me indicar, curso de web! boa tarde

natnael.h...@kindcentrumoranje-nassau.nl

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Dec 10, 2019, 5:12:02 AM12/10/19
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Op donderdag 23 mei 2019 10:34:14 UTC+2 schreef Andrea Marchesini:

hchai...@gmail.com

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hani...@gmail.com

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go37...@gmail.com

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On Sunday, 3 November 2019 04:32:16 UTC+8, 001m...@gmail.com wrote:
> <001M
> >HTML. Is save Thanks

go37...@gmail.com

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On Friday, 8 November 2019 07:43:12 UTC+8, 23gpaga...@dc-tech.org wrote:
> how you are

go37...@gmail.com

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go37...@gmail.com

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On Monday, 18 November 2019 17:05:34 UTC+8, 07ma...@elev.kungalv.se wrote:

go37...@gmail.com

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On Sunday, 5 January 2020 12:27:51 UTC+8, go37...@gmail.com wrote:

go37...@gmail.com

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Jan 4, 2020, 11:30:16 PM1/4/20
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On Thursday, 23 May 2019 16:53:19 UTC+8, Frederik Braun wrote:
> Having read the proposal, I think it's a good mechanism for us to know
> about websites that want third-party cookies and it seems less costly to
> deploy for websites than Storage Access API.
>
> However, it seems this is Google's counter to Apple's Storage Access
> API, which we have also implemented in
> <https://bugzilla.mozilla.org/show_bug.cgi?id=1469714>.
>
> What's our plan here? Offer both and find out what's going to get more
> traction?
>
> Am 23.05.19 um 10:33 schrieb Andrea Marchesini:
> > _______________________________________________
> > dev-platform mailing list
> > dev-pl...@lists.mozilla.org
> > https://lists.mozilla.org/listinfo/dev-platform
> >

go37...@gmail.com

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Jan 4, 2020, 11:30:32 PM1/4/20
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On Thursday, 23 May 2019 17:40:10 UTC+8, Mike West wrote:
> On Thu, May 23, 2019 at 10:53 AM Frederik Braun <fbr...@mozilla.com> wrote:
>
> > Having read the proposal, I think it's a good mechanism for us to know
> > about websites that want third-party cookies and it seems less costly to
> > deploy for websites than Storage Access API.
> >
> > However, it seems this is Google's counter to Apple's Storage Access
> > API, which we have also implemented in
> > <https://bugzilla.mozilla.org/show_bug.cgi?id=1469714>.
> >
>
> IMO, these are not at all mutually exclusive. Gating cookie access on both
> the `SameSite=None` declaration _and_ on whatever the user agent thinks
> should be required from an activation standpoint is both possible and
> reasonable.
>
> -mike

go37...@gmail.com

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Jan 4, 2020, 11:30:52 PM1/4/20
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On Thursday, 24 October 2019 00:49:28 UTC+8, 2027grue...@aaps.k12.mi.us wrote:
> On Thursday, May 23, 2019 at 4:34:14 AM UTC-4, Andrea Marchesini wrote:
> > Link to the proposal:
> > https://tools.ietf.org/html/draft-west-cookie-incrementalism-00
> >
> > Summary:yo dudes. were dem cookies at

go37...@gmail.com

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Jan 4, 2020, 11:31:15 PM1/4/20
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On Sunday, 3 November 2019 05:48:57 UTC+8, 001m...@gmail.com wrote:
> Asi O es mejor +
> A cookie associated with a resource at http://trc.taboola.com/ was set with `SameSite=None` but without `Secure`. A future release of Chrome will only deliver cookies marked `SameSite=None` if they are also marked `Secure`. You can review cookies in developer tools under Application>Storage>Cookies and see more details at https://www.chromestatus.com/feature/5633521622188032.
>
>
>
> Add:lpcres.delve.office.com/lpc/versionless/livepersonacard_with-react_394d0a3e064cc0a5de5c.js:16 Some icons were re-registered. Applications should only call registerIcons for any given icon once. Redefining what an icon is may have unintended consequences. Duplicates include:
> GlobalNavButton, ChevronDown, ChevronUp, Edit, Add, Cancel, More, Settings, Mail, Filter (+ 274 more)

go37...@gmail.com

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go37...@gmail.com

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On Monday, 16 December 2019 05:13:14 UTC+8, hchai...@gmail.com wrote:

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On Thursday, May 23, 2019 at 1:34:14 AM UTC-7, Andrea Marchesini wrote:

one...@gmail.com

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wearepeac...@gmail.com

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Feb 14, 2020, 10:33:31 AM2/14/20
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четверг, 23 мая 2019 г., 16:34:14 UTC+8 пользователь Andrea Marchesini написал:
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amarc...@mozilla.com

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Feb 27, 2020, 1:13:30 PM2/27/20
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Hi everyone,

here is something more about cookies sameSite=lax by default.

In order to test this feature properly and to see the level of breakage introduced, we've decided to enable it in nightly.

Bug: https://bugzilla.mozilla.org/show_bug.cgi?id=1604212

This feature is partially covered by web-platform-tests:
https://searchfox.org/mozilla-central/source/testing/web-platform/tests/cookies/samesite-none-secure
https://searchfox.org/mozilla-central/source/testing/web-platform/tests/cookies/samesite

As you know, Chrome is already rolling out this feature: it's active for 1% of their population.

I filed a meta bug to collect breakages - https://bugzilla.mozilla.org/show_bug.cgi?id=1618610

francoel...@gmail.com

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Feb 29, 2020, 8:15:53 AM2/29/20
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so che siete dei bugiardi e vi scopriranno presto i carabinieri

F R A N C I S

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Mar 2, 2020, 2:30:15 AM3/2/20
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El jueves, 23 de mayo de 2019, 4:34:14 (UTC-4), Andrea Marchesini escribió:

kolony...@gmail.com

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Mar 5, 2020, 3:45:17 PM3/5/20
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23 Mayıs 2019 Perşembe 11:34:14 UTC+3 tarihinde Andrea Marchesini yazdı:

yucaga...@gmail.com

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Mar 6, 2020, 1:42:40 PM3/6/20
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eae galera
n tirem meu google de mim
porfavor

gabim...@gmail.com

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Mar 9, 2020, 2:01:10 PM3/9/20
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בתאריך יום חמישי, 23 במאי 2019 בשעה 11:34:14 UTC+3, מאת Andrea Marchesini:

thale...@gmail.com

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Mar 11, 2020, 8:03:27 PM3/11/20
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oooooooo aai mi pklasereeeee
3wwre33gtr
h23tytgm

gard...@gmail.com

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Mar 31, 2020, 7:53:10 AM3/31/20
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On Thursday, May 23, 2019 at 4:34:14 AM UTC-4, Andrea Marchesini wrote:
who do we blame this one on ladies no one wants the truth for some reason

kyle.bl...@gmail.com

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bb08...@gmail.com

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Add me. Hhhh

tysoo...@gmail.com

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Apr 11, 2020, 9:32:10 AM4/11/20
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در پنجشنبه 23 مهٔ 2019، ساعت 13:04:14 (UTC+4:30)، Andrea Marchesini نوشته:

maksga...@gmail.com

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Apr 13, 2020, 12:40:43 PM4/13/20