{
 "notes": "A workaround for the lack of support in Firefox 31 - Firefox 48 is to use [CSS variables](https://developer.mozilla.org/en-US/docs/Web/CSS/Using_CSS_variables). See [this Stack Overflow answer](https://stackoverflow.com/a/29282573/94197) for an example.",
 "support": {
  "Android Browser": "y 2.1",
  "Baidu Browser": "y 13.52",
  "Blackberry Browser": "y 7",
  "Chrome": "y 4",
  "Chrome for Android": "y 142",
  "Edge": "y 12",
  "Firefox": "y 49",
  "Firefox for Android": "y 144",
  "IE": "y 5.5",
  "IE Mobile": "y 10",
  "KaiOS Browser": "y 3.0",
  "Opera": "y 15",
  "Opera Mini": "n all",
  "Opera Mobile": "y 80",
  "QQ Browser": "y 14.9",
  "Safari": "y 3.1",
  "Safari on iOS": "y 3.2",
  "Samsung Internet": "y 4",
  "UC Browser for Android": "y 15.5"
 },
 "url": "https://w3c.github.io/csswg-drafts/css-backgrounds-4/#background-position-longhands"
}