WPT
wpt / cookies / partitioned-cookies / partitioned-cookies-samesite-attribute.https.html
Runs: Chrome 155.0.8041.0 (wpt@7fcff3881, 2026-09-04) | Firefox 157.0a1 (wpt@7fcff3881, 2026-09-04) | Safari 251 preview (wpt@a1e944e7a, 2026-09-04) | Ladybird 1.0-a7825 (wpt@9298d21d2, 2026-09-04) | Servo Servo 0.6 (wpt@7e3d005d7, 2026-09-03) | Blitz a50cb8971 (wpt@a95401e4e, 2026-09-03)
View on the Blitz WPT dashboard | Open test on wpt.live | wpt.fyi
| Chrome | Firefox | Safari | Ladybird | Servo | Blitz | |
|---|---|---|---|---|---|---|
| Total | 3/3 | 2/3 | 2/3 | 1/3 | 1/3 | NOT RUN |
| Subtest | Chrome | Firefox | Safari | Ladybird | Servo | Blitz |
|---|---|---|---|---|---|---|
| In top-level contexts, partitioned cookies default to the same SameSite attribute as unpartitioned cookies. | PASS | PASS | PASS | FAIL | FAIL | — |
| In top-level contexts, partitioned cookies can be set with all SameSite attributes. | PASS | PASS | PASS | PASS | PASS | — |
| In embedded cross-site contexts, partitioned cookies can only be set with explicit SameSite=None | PASS | — | FAIL | — | — | — |