{
  "css": {
    "at-rules": {
      "document": {
        "__compat": {
          "description": "<code>@document</code>",
          "mdn_url": "https://developer.mozilla.org/docs/Web/CSS/@document",
          "support": {
            "chrome": {
              "version_added": false
            },
            "chrome_android": {
              "version_added": false
            },
            "edge": {
              "version_added": false
            },
            "firefox": [
              {
                "prefix": "-moz-",
                "version_added": "61",
                "flags": [
                  {
                    "type": "preference",
                    "name": "layout.css.moz-document.content.enabled",
                    "value_to_set": "true"
                  }
                ],
                "notes": "Disabled by default in web pages, except for an empty <code>url-prefix()</code> value, which is supported due to its <a href='https://css-tricks.com/snippets/css/css-hacks-targeting-firefox/'>use in Firefox browser detection</a>. Still supported in user stylesheets."
              },
              {
                "prefix": "-moz-",
                "version_added": "1.5",
                "version_removed": "61"
              }
            ],
            "firefox_android": [
              {
                "prefix": "-moz-",
                "version_added": "61",
                "flags": [
                  {
                    "type": "preference",
                    "name": "layout.css.moz-document.content.enabled",
                    "value_to_set": "true"
                  }
                ],
                "notes": "Disabled by default in web pages, except for an empty <code>url-prefix()</code> value, which is supported due to its <a href='https://css-tricks.com/snippets/css/css-hacks-targeting-firefox/'>use in Firefox browser detection</a>. Still supported in user stylesheets."
              },
              {
                "prefix": "-moz-",
                "version_added": "4",
                "version_removed": "61"
              }
            ],
            "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": true,
            "standard_track": false,
            "deprecated": false
          }
        },
        "regexp": {
          "__compat": {
            "description": "<code>regexp()</code>",
            "support": {
              "chrome": {
                "version_added": false
              },
              "chrome_android": {
                "version_added": false
              },
              "edge": {
                "version_added": false
              },
              "firefox": {
                "version_added": "6"
              },
              "firefox_android": {
                "version_added": "6"
              },
              "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": true,
              "standard_track": false,
              "deprecated": false
            }
          }
        }
      }
    }
  }
}