{
  "http": {
    "headers": {
      "Set-Cookie": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/HTTP/Reference/Headers/Set-Cookie",
          "spec_url": "https://httpwg.org/specs/rfc6265.html#sane-set-cookie",
          "tags": [
            "web-features:cookies"
          ],
          "support": {
            "chrome": {
              "version_added": "1"
            },
            "chrome_android": "mirror",
            "edge": {
              "version_added": "12"
            },
            "firefox": {
              "version_added": "1"
            },
            "firefox_android": "mirror",
            "ie": {
              "version_added": "≤11"
            },
            "oculus": "mirror",
            "opera": {
              "version_added": "≤12.1"
            },
            "opera_android": "mirror",
            "safari": {
              "version_added": "1",
              "notes": "Cookies with `Secure` flag are not sent to unsecured `http://localhost/` endpoints. See [bug 281149](https://webkit.org/b/281149)."
            },
            "safari_ios": "mirror",
            "samsunginternet_android": "mirror",
            "webview_android": "mirror",
            "webview_ios": "mirror"
          },
          "status": {
            "experimental": false,
            "standard_track": true,
            "deprecated": false
          }
        },
        "HttpOnly": {
          "__compat": {
            "spec_url": "https://httpwg.org/specs/rfc6265.html#httponly-attribute",
            "tags": [
              "web-features:cookies"
            ],
            "support": {
              "chrome": {
                "version_added": "1"
              },
              "chrome_android": "mirror",
              "edge": {
                "version_added": "12"
              },
              "firefox": {
                "version_added": "3"
              },
              "firefox_android": "mirror",
              "ie": {
                "version_added": "9"
              },
              "oculus": "mirror",
              "opera": {
                "version_added": "11"
              },
              "opera_android": "mirror",
              "safari": {
                "version_added": "5"
              },
              "safari_ios": {
                "version_added": "4"
              },
              "samsunginternet_android": "mirror",
              "webview_android": "mirror",
              "webview_ios": "mirror"
            },
            "status": {
              "experimental": false,
              "standard_track": true,
              "deprecated": false
            }
          }
        },
        "Max-Age": {
          "__compat": {
            "spec_url": "https://httpwg.org/specs/rfc6265.html#max-age-attribute",
            "tags": [
              "web-features:cookies"
            ],
            "support": {
              "chrome": {
                "version_added": "1"
              },
              "chrome_android": "mirror",
              "edge": {
                "version_added": "12"
              },
              "firefox": {
                "version_added": "1"
              },
              "firefox_android": "mirror",
              "ie": {
                "version_added": "8"
              },
              "oculus": "mirror",
              "opera": "mirror",
              "opera_android": "mirror",
              "safari": {
                "version_added": "1"
              },
              "safari_ios": "mirror",
              "samsunginternet_android": "mirror",
              "webview_android": "mirror",
              "webview_ios": "mirror"
            },
            "status": {
              "experimental": false,
              "standard_track": true,
              "deprecated": false
            }
          }
        },
        "Partitioned": {
          "__compat": {
            "spec_url": "https://www.ietf.org/archive/id/draft-cutler-httpbis-partitioned-cookies-01.html#section-2.1",
            "tags": [
              "web-features:partitioned-cookies"
            ],
            "support": {
              "chrome": {
                "version_added": "114"
              },
              "chrome_android": "mirror",
              "edge": "mirror",
              "firefox": {
                "version_added": "141"
              },
              "firefox_android": "mirror",
              "oculus": "mirror",
              "opera": "mirror",
              "opera_android": "mirror",
              "safari": [
                {
                  "version_added": "26.2"
                },
                {
                  "version_added": "18.4",
                  "version_removed": "18.5",
                  "impl_url": "https://webkit.org/b/292975"
                }
              ],
              "safari_ios": "mirror",
              "samsunginternet_android": "mirror",
              "webview_android": "mirror",
              "webview_ios": "mirror"
            },
            "status": {
              "experimental": false,
              "standard_track": true,
              "deprecated": false
            }
          }
        },
        "SameSite": {
          "__compat": {
            "spec_url": [
              "https://httpwg.org/specs/rfc6265.html#sane-set-cookie",
              "https://httpwg.org/http-extensions/draft-ietf-httpbis-rfc6265bis.html#name-the-samesite-attribute"
            ],
            "tags": [
              "web-features:cookies"
            ],
            "support": {
              "chrome": {
                "version_added": "51"
              },
              "chrome_android": "mirror",
              "edge": {
                "version_added": "16"
              },
              "firefox": {
                "version_added": "60"
              },
              "firefox_android": "mirror",
              "ie": {
                "version_added": "11"
              },
              "oculus": "mirror",
              "opera": {
                "version_added": "39"
              },
              "opera_android": "mirror",
              "safari": [
                {
                  "version_added": "13",
                  "notes": "Safari 13 on macOS 10.14 (Mojave), treats `SameSite=None` and invalid values as `Strict`. This is fixed in version 10.15 (Catalina) and later."
                },
                {
                  "version_added": "12",
                  "version_removed": "13",
                  "partial_implementation": true,
                  "notes": "Treats `SameSite=None` and invalid values as `Strict` in macOS before 10.15 Catalina. See [bug 198181](https://webkit.org/b/198181)."
                }
              ],
              "safari_ios": [
                {
                  "version_added": "13"
                },
                {
                  "version_added": "12.2",
                  "version_removed": "13",
                  "partial_implementation": true,
                  "notes": "Treats `SameSite=None` and invalid values as `Strict` in iOS before 13. See [bug 198181](https://webkit.org/b/198181)."
                }
              ],
              "samsunginternet_android": "mirror",
              "webview_android": "mirror",
              "webview_ios": "mirror"
            },
            "status": {
              "experimental": false,
              "standard_track": true,
              "deprecated": false
            }
          },
          "Lax": {
            "__compat": {
              "description": "`SameSite=Lax`",
              "spec_url": "https://httpwg.org/http-extensions/draft-ietf-httpbis-rfc6265bis.html#name-the-samesite-attribute",
              "tags": [
                "web-features:cookies"
              ],
              "support": {
                "chrome": {
                  "version_added": "51"
                },
                "chrome_android": "mirror",
                "edge": {
                  "version_added": "16"
                },
                "firefox": {
                  "version_added": "60"
                },
                "firefox_android": "mirror",
                "ie": {
                  "version_added": "11"
                },
                "oculus": "mirror",
                "opera": {
                  "version_added": "39"
                },
                "opera_android": "mirror",
                "safari": {
                  "version_added": "12"
                },
                "safari_ios": {
                  "version_added": "12.2"
                },
                "samsunginternet_android": "mirror",
                "webview_android": "mirror",
                "webview_ios": "mirror"
              },
              "status": {
                "experimental": false,
                "standard_track": true,
                "deprecated": false
              }
            }
          },
          "Lax_default": {
            "__compat": {
              "description": "Defaults to `Lax`",
              "spec_url": "https://httpwg.org/http-extensions/draft-ietf-httpbis-rfc6265bis.html#name-the-samesite-attribute",
              "tags": [
                "web-features:cookies"
              ],
              "support": {
                "chrome": {
                  "version_added": "80"
                },
                "chrome_android": "mirror",
                "edge": {
                  "version_added": "86"
                },
                "firefox": {
                  "version_added": "69",
                  "flags": [
                    {
                      "type": "preference",
                      "name": "network.cookie.sameSite.laxByDefault",
                      "value_to_set": "true"
                    }
                  ]
                },
                "firefox_android": "mirror",
                "oculus": "mirror",
                "opera": {
                  "version_added": "71"
                },
                "opera_android": {
                  "version_added": "60"
                },
                "safari": {
                  "version_added": false
                },
                "safari_ios": "mirror",
                "samsunginternet_android": "mirror",
                "webview_android": "mirror",
                "webview_ios": "mirror"
              },
              "status": {
                "experimental": false,
                "standard_track": true,
                "deprecated": false
              }
            }
          },
          "None": {
            "__compat": {
              "description": "`SameSite=None`",
              "spec_url": "https://httpwg.org/http-extensions/draft-ietf-httpbis-rfc6265bis.html#name-the-samesite-attribute",
              "tags": [
                "web-features:cookies"
              ],
              "support": {
                "chrome": [
                  {
                    "version_added": "67"
                  },
                  {
                    "version_added": "51",
                    "version_removed": "67",
                    "partial_implementation": true,
                    "notes": "Rejects cookies with `SameSite=None`. See [SameSite=None: Known Incompatible Clients](https://www.chromium.org/updates/same-site/incompatible-clients)."
                  }
                ],
                "chrome_android": "mirror",
                "edge": {
                  "version_added": "16"
                },
                "firefox": {
                  "version_added": "60"
                },
                "firefox_android": "mirror",
                "ie": {
                  "version_added": "11"
                },
                "oculus": "mirror",
                "opera": [
                  {
                    "version_added": "54"
                  },
                  {
                    "version_added": "51",
                    "version_removed": "54",
                    "partial_implementation": true,
                    "notes": "Rejects cookies with `SameSite=None`. See [SameSite=None: Known Incompatible Clients](https://www.chromium.org/updates/same-site/incompatible-clients)."
                  }
                ],
                "opera_android": "mirror",
                "safari": {
                  "version_added": "13",
                  "notes": "Not supported before macOS version 10.15 (Catalina)."
                },
                "safari_ios": {
                  "version_added": "13"
                },
                "samsunginternet_android": [
                  {
                    "version_added": "9.4"
                  },
                  {
                    "version_added": "5.4",
                    "version_removed": "9.4",
                    "partial_implementation": true,
                    "notes": "Rejects cookies with `SameSite=None`. See [SameSite=None: Known Incompatible Clients](https://www.chromium.org/updates/same-site/incompatible-clients)."
                  }
                ],
                "webview_android": "mirror",
                "webview_ios": "mirror"
              },
              "status": {
                "experimental": false,
                "standard_track": true,
                "deprecated": false
              }
            }
          },
          "Strict": {
            "__compat": {
              "description": "`SameSite=Strict`",
              "spec_url": "https://httpwg.org/http-extensions/draft-ietf-httpbis-rfc6265bis.html#name-the-samesite-attribute",
              "tags": [
                "web-features:cookies"
              ],
              "support": {
                "chrome": {
                  "version_added": "51"
                },
                "chrome_android": "mirror",
                "edge": {
                  "version_added": "16"
                },
                "firefox": {
                  "version_added": "60"
                },
                "firefox_android": "mirror",
                "ie": {
                  "version_added": "11"
                },
                "oculus": "mirror",
                "opera": {
                  "version_added": "39"
                },
                "opera_android": "mirror",
                "safari": {
                  "version_added": "12"
                },
                "safari_ios": {
                  "version_added": "12.2"
                },
                "samsunginternet_android": "mirror",
                "webview_android": "mirror",
                "webview_ios": "mirror"
              },
              "status": {
                "experimental": false,
                "standard_track": true,
                "deprecated": false
              }
            }
          },
          "none_requires_secure": {
            "__compat": {
              "description": "Secure attribute required if `SameSite=None`",
              "spec_url": "https://httpwg.org/http-extensions/draft-ietf-httpbis-rfc6265bis.html#name-storage-model",
              "tags": [
                "web-features:cookies"
              ],
              "support": {
                "chrome": {
                  "version_added": "80"
                },
                "chrome_android": "mirror",
                "edge": {
                  "version_added": "86"
                },
                "firefox": {
                  "version_added": "131"
                },
                "firefox_android": "mirror",
                "oculus": "mirror",
                "opera": {
                  "version_added": "71"
                },
                "opera_android": {
                  "version_added": "60"
                },
                "safari": {
                  "version_added": false
                },
                "safari_ios": "mirror",
                "samsunginternet_android": "mirror",
                "webview_android": {
                  "version_added": false
                },
                "webview_ios": "mirror"
              },
              "status": {
                "experimental": false,
                "standard_track": true,
                "deprecated": false
              }
            }
          },
          "schemeful": {
            "__compat": {
              "description": "URL scheme-aware (\"schemeful\")",
              "spec_url": "https://httpwg.org/http-extensions/draft-ietf-httpbis-rfc6265bis.html#name-same-site-and-cross-site-re",
              "tags": [
                "web-features:cookies"
              ],
              "support": {
                "chrome": {
                  "version_added": "91"
                },
                "chrome_android": "mirror",
                "edge": "mirror",
                "firefox": {
                  "version_added": "79",
                  "flags": [
                    {
                      "type": "preference",
                      "name": "network.cookie.sameSite.schemeful",
                      "value_to_set": "true"
                    }
                  ]
                },
                "firefox_android": "mirror",
                "oculus": "mirror",
                "opera": "mirror",
                "opera_android": "mirror",
                "safari": {
                  "version_added": false
                },
                "safari_ios": "mirror",
                "samsunginternet_android": "mirror",
                "webview_android": "mirror",
                "webview_ios": "mirror"
              },
              "status": {
                "experimental": false,
                "standard_track": true,
                "deprecated": false
              }
            }
          }
        },
        "host_secure_prefixes": {
          "__compat": {
            "description": "Cookie prefixes: `__Host-` and `__Secure-`",
            "spec_url": [
              "https://httpwg.org/http-extensions/draft-ietf-httpbis-rfc6265bis.html#name-the-__host-prefix",
              "https://httpwg.org/http-extensions/draft-ietf-httpbis-rfc6265bis.html#name-the-__secure-prefix"
            ],
            "tags": [
              "web-features:cookies"
            ],
            "support": {
              "chrome": {
                "version_added": "49"
              },
              "chrome_android": "mirror",
              "edge": "mirror",
              "firefox": {
                "version_added": "50"
              },
              "firefox_android": "mirror",
              "oculus": "mirror",
              "opera": "mirror",
              "opera_android": "mirror",
              "safari": {
                "version_added": "13"
              },
              "safari_ios": "mirror",
              "samsunginternet_android": "mirror",
              "webview_android": "mirror",
              "webview_ios": "mirror"
            },
            "status": {
              "experimental": false,
              "standard_track": true,
              "deprecated": false
            }
          }
        },
        "http_host-http_prefixes": {
          "__compat": {
            "description": "Cookie prefixes: `__Http-` and `__Host-Http-`",
            "spec_url": [
              "https://httpwg.org/http-extensions/draft-ietf-httpbis-layered-cookies.html#name-the-__http-prefix",
              "https://httpwg.org/http-extensions/draft-ietf-httpbis-layered-cookies.html#name-the-__host-http-prefix"
            ],
            "tags": [
              "web-features:cookies"
            ],
            "support": {
              "chrome": {
                "version_added": "140"
              },
              "chrome_android": "mirror",
              "edge": "mirror",
              "firefox": [
                {
                  "version_added": "143"
                },
                {
                  "version_added": "142",
                  "version_removed": "143",
                  "partial_implementation": true,
                  "notes": "`__Host-Http-` is supported under its original name `__HostHttp-`. See [bug 1982555](https://bugzil.la/1982555)."
                }
              ],
              "firefox_android": "mirror",
              "oculus": "mirror",
              "opera": "mirror",
              "opera_android": "mirror",
              "safari": {
                "version_added": false
              },
              "safari_ios": "mirror",
              "samsunginternet_android": "mirror",
              "webview_android": "mirror",
              "webview_ios": "mirror"
            },
            "status": {
              "experimental": false,
              "standard_track": true,
              "deprecated": false
            }
          }
        }
      }
    }
  }
}