{
  "css": {
    "properties": {
      "box-flex": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/CSS/box-flex",
          "support": {
            "chrome": {
              "prefix": "-webkit-",
              "version_added": "1"
            },
            "chrome_android": {
              "prefix": "-webkit-",
              "version_added": "18"
            },
            "edge": {
              "prefix": "-webkit-",
              "version_added": "12"
            },
            "firefox": [
              {
                "prefix": "-moz-",
                "version_added": "1"
              },
              {
                "prefix": "-webkit-",
                "version_added": "49"
              },
              {
                "prefix": "-webkit-",
                "version_added": "48",
                "flags": [
                  {
                    "type": "preference",
                    "name": "layout.css.prefixes.webkit",
                    "value_to_set": "true"
                  }
                ]
              }
            ],
            "firefox_android": [
              {
                "prefix": "-moz-",
                "version_added": "4"
              },
              {
                "prefix": "-webkit-",
                "version_added": "49"
              },
              {
                "prefix": "-webkit-",
                "version_added": "48",
                "flags": [
                  {
                    "type": "preference",
                    "name": "layout.css.prefixes.webkit",
                    "value_to_set": "true"
                  }
                ]
              }
            ],
            "ie": {
              "version_added": false
            },
            "opera": {
              "prefix": "-webkit-",
              "version_added": "15"
            },
            "opera_android": {
              "prefix": "-webkit-",
              "version_added": "14"
            },
            "safari": [
              {
                "prefix": "-webkit-",
                "version_added": "3"
              },
              {
                "prefix": "-khtml-",
                "version_added": "1.1",
                "version_removed": "3"
              }
            ],
            "safari_ios": {
              "prefix": "-webkit-",
              "version_added": "1"
            },
            "samsunginternet_android": {
              "version_added": "1.0",
              "prefix": "-webkit-"
            },
            "webview_android": {
              "prefix": "-webkit-",
              "version_added": "≤37"
            }
          },
          "status": {
            "experimental": false,
            "standard_track": false,
            "deprecated": true
          }
        }
      }
    }
  }
}