{
  "webextensions": {
    "manifest": {
      "background": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Mozilla/Add-ons/WebExtensions/manifest.json/background",
          "support": {
            "chrome": {
              "version_added": true
            },
            "edge": {
              "version_added": "14",
              "notes": "The 'persistent' property is mandatory."
            },
            "firefox": {
              "version_added": "48"
            },
            "firefox_android": {
              "version_added": "48"
            },
            "opera": {
              "version_added": true
            }
          }
        },
        "persistent": {
          "__compat": {
            "support": {
              "chrome": {
                "version_added": true
              },
              "edge": {
                "version_added": "14"
              },
              "firefox": {
                "version_added": false
              },
              "firefox_android": {
                "version_added": false
              },
              "opera": {
                "version_added": true
              }
            }
          }
        }
      }
    }
  }
}