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              {
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              "notes": "Only works on Windows 8+."
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            "opera": {
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              "notes": "Only works on Windows 8+."
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                    "type": "preference",
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              "version_added": false
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              "version_added": "11",
              "notes": "Only works on Windows 8+."
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            "opera": {
              "version_added": "15"
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            "opera_android": {
              "version_added": "30"
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              {
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                "flags": [
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                    "type": "preference",
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            "firefox_android": {
              "version_added": false
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              "notes": "Only works on Windows 8+."
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            "opera": {
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            "opera_android": {
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            "edge": {
              "version_added": "17"
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            "edge_mobile": {
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              {
                "version_added": "25",
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                "flags": [
                  {
                    "type": "preference",
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                ],
                "notes": "Limited support to a whitelist of sites, for example YouTube, Netflix, and other popular streaming sites. The whitelist was removed when Media Source Extensions was enabled by default in Firefox 42."
              }
            ],
            "firefox_android": {
              "version_added": false
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            "ie": {
              "version_added": "11",
              "notes": "Only works on Windows 8+."
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            "opera": {
              "version_added": "15"
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            "opera_android": {
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            "edge_mobile": {
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                "flags": [
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                "notes": "Limited support to a whitelist of sites, for example YouTube, Netflix, and other popular streaming sites. The whitelist was removed when Media Source Extensions was enabled by default in Firefox 42."
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            "opera": {
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            "opera_android": {
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            "edge_mobile": {
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              }
            ],
            "firefox_android": {
              "version_added": false
            },
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              "notes": "Only works on Windows 8+."
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              "version_added": "15"
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            "opera_android": {
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