{
  "css": {
    "properties": {
      "mask-origin": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/CSS/mask-origin",
          "support": {
            "chrome": {
              "prefix": "-webkit-",
              "version_added": "1",
              "notes": "The <code>margin-box</code> value is unsupported."
            },
            "chrome_android": {
              "prefix": "-webkit-",
              "version_added": "18",
              "notes": "The <code>margin-box</code> value is unsupported."
            },
            "edge": {
              "prefix": "-webkit-",
              "version_added": "79",
              "notes": "The <code>margin-box</code> value is unsupported."
            },
            "firefox": [
              {
                "version_added": "53"
              },
              {
                "version_added": "20",
                "version_removed": "53",
                "flags": [
                  {
                    "type": "preference",
                    "name": "layout.css.masking.enabled",
                    "value_to_set": "true"
                  }
                ]
              }
            ],
            "firefox_android": [
              {
                "version_added": "53"
              },
              {
                "version_added": "20",
                "version_removed": "53",
                "flags": [
                  {
                    "type": "preference",
                    "name": "layout.css.masking.enabled",
                    "value_to_set": "true"
                  }
                ]
              }
            ],
            "ie": {
              "version_added": false
            },
            "opera": {
              "prefix": "-webkit-",
              "version_added": "15",
              "notes": "The <code>margin-box</code> value is unsupported."
            },
            "opera_android": {
              "prefix": "-webkit-",
              "version_added": "14",
              "notes": "The <code>margin-box</code> value is unsupported."
            },
            "safari": {
              "prefix": "-webkit-",
              "version_added": "4",
              "notes": "The <code>margin-box</code> value is unsupported."
            },
            "safari_ios": {
              "prefix": "-webkit-",
              "version_added": "3.2",
              "notes": "The <code>margin-box</code> value is unsupported."
            },
            "samsunginternet_android": {
              "prefix": "-webkit-",
              "version_added": "1.0",
              "notes": "The <code>margin-box</code> value is unsupported."
            },
            "webview_android": {
              "prefix": "-webkit-",
              "version_added": "2",
              "notes": "The <code>margin-box</code> value is unsupported."
            }
          },
          "status": {
            "experimental": false,
            "standard_track": true,
            "deprecated": false
          }
        },
        "fill-box": {
          "__compat": {
            "description": "<code>fill-box</code>",
            "support": {
              "chrome": {
                "version_added": false
              },
              "chrome_android": {
                "version_added": false
              },
              "edge": {
                "version_added": false
              },
              "firefox": {
                "version_added": false
              },
              "firefox_android": {
                "version_added": false
              },
              "ie": {
                "version_added": false
              },
              "opera": {
                "version_added": false
              },
              "opera_android": {
                "version_added": false
              },
              "safari": {
                "version_added": false
              },
              "safari_ios": {
                "version_added": false
              },
              "samsunginternet_android": {
                "version_added": false
              },
              "webview_android": {
                "version_added": false
              }
            },
            "status": {
              "experimental": false,
              "standard_track": true,
              "deprecated": false
            }
          }
        },
        "non_standard_values": {
          "__compat": {
            "description": "Non-standard values <code>content</code>, <code>padding</code>, <code>border</code>",
            "support": {
              "chrome": {
                "prefix": "-webkit-",
                "version_added": "1"
              },
              "chrome_android": {
                "prefix": "-webkit-",
                "version_added": "18"
              },
              "edge": {
                "prefix": "-webkit-",
                "version_added": "79"
              },
              "firefox": {
                "version_added": false
              },
              "firefox_android": {
                "version_added": false
              },
              "ie": {
                "version_added": false
              },
              "opera": {
                "prefix": "-webkit-",
                "version_added": "15"
              },
              "opera_android": {
                "prefix": "-webkit-",
                "version_added": "14"
              },
              "safari": {
                "prefix": "-webkit-",
                "version_added": "4"
              },
              "safari_ios": {
                "prefix": "-webkit-",
                "version_added": "3.2"
              },
              "samsunginternet_android": {
                "prefix": "-webkit-",
                "version_added": "1.0"
              },
              "webview_android": {
                "prefix": "-webkit-",
                "version_added": "2"
              }
            },
            "status": {
              "experimental": false,
              "standard_track": false,
              "deprecated": false
            }
          }
        },
        "stroke-box": {
          "__compat": {
            "description": "<code>stroke-box</code>",
            "support": {
              "chrome": {
                "version_added": false
              },
              "chrome_android": {
                "version_added": false
              },
              "edge": {
                "version_added": false
              },
              "firefox": {
                "version_added": false
              },
              "firefox_android": {
                "version_added": false
              },
              "ie": {
                "version_added": false
              },
              "opera": {
                "version_added": false
              },
              "opera_android": {
                "version_added": false
              },
              "safari": {
                "version_added": false
              },
              "safari_ios": {
                "version_added": false
              },
              "samsunginternet_android": {
                "version_added": false
              },
              "webview_android": {
                "version_added": false
              }
            },
            "status": {
              "experimental": false,
              "standard_track": true,
              "deprecated": false
            }
          }
        },
        "view-box": {
          "__compat": {
            "description": "<code>view-box</code>",
            "support": {
              "chrome": {
                "version_added": false
              },
              "chrome_android": {
                "version_added": false
              },
              "edge": {
                "version_added": false
              },
              "firefox": {
                "version_added": false
              },
              "firefox_android": {
                "version_added": false
              },
              "ie": {
                "version_added": false
              },
              "opera": {
                "version_added": false
              },
              "opera_android": {
                "version_added": false
              },
              "safari": {
                "version_added": false
              },
              "safari_ios": {
                "version_added": false
              },
              "samsunginternet_android": {
                "version_added": false
              },
              "webview_android": {
                "version_added": false
              }
            },
            "status": {
              "experimental": false,
              "standard_track": true,
              "deprecated": false
            }
          }
        }
      }
    }
  }
}