{
  "webextensions": {
    "manifest": {
      "browser_action": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Mozilla/Add-ons/WebExtensions/manifest.json/browser_action",
          "support": {
            "chrome": {
              "version_added": true,
              "notes": "If an extension defines a browser action, it is not allowed to define a page action as well."
            },
            "edge": {
              "version_added": "14"
            },
            "firefox": {
              "version_added": "48"
            },
            "firefox_android": {
              "version_added": "55"
            },
            "opera": {
              "version_added": true,
              "notes": "If an extension defines a browser action, it is not allowed to define a page action as well."
            }
          }
        },
        "browser_style": {
          "__compat": {
            "support": {
              "chrome": {
                "version_added": false
              },
              "edge": {
                "version_added": false
              },
              "firefox": {
                "version_added": "48"
              },
              "firefox_android": {
                "version_added": false
              },
              "opera": {
                "version_added": false
              }
            }
          }
        },
        "default_area": {
          "__compat": {
            "support": {
              "chrome": {
                "version_added": false
              },
              "edge": {
                "version_added": false,
                "notes": "Microsoft Edge instead uses the <a href='https://developer.mozilla.org/docs/Mozilla/Add-ons/WebExtensions/manifest.json/browser_specific_settings#Microsoft_Edge_properties'><code>browser_action_next_to_addressbar</code> property</a> of the <a href='https://developer.mozilla.org/docs/Mozilla/Add-ons/WebExtensions/manifest.json/browser_specific_settings'><code>browser_specific_settings</code> manifest key</a>"
              },
              "firefox": {
                "version_added": "54"
              },
              "firefox_android": {
                "version_added": false
              },
              "opera": {
                "version_added": false
              }
            }
          }
        },
        "default_icon": {
          "__compat": {
            "support": {
              "chrome": {
                "version_added": true,
                "notes": "SVG icons are not supported."
              },
              "edge": {
                "version_added": "14",
                "notes": [
                  "SVG icons are not supported.",
                  "'default_icon' must be an object, with explicit sizes."
                ]
              },
              "firefox": {
                "version_added": "48"
              },
              "firefox_android": {
                "version_added": false
              },
              "opera": {
                "version_added": true,
                "notes": "SVG icons are not supported."
              }
            }
          }
        },
        "default_popup": {
          "__compat": {
            "support": {
              "chrome": {
                "version_added": true
              },
              "edge": {
                "version_added": "14"
              },
              "firefox": {
                "version_added": "48"
              },
              "firefox_android": {
                "version_added": "57"
              },
              "opera": {
                "version_added": true
              }
            }
          }
        },
        "default_title": {
          "__compat": {
            "support": {
              "chrome": {
                "version_added": true
              },
              "edge": {
                "version_added": "14"
              },
              "firefox": {
                "version_added": "48"
              },
              "firefox_android": {
                "version_added": "55",
                "notes": "Browser actions are presented as menu items, and the title is the menu item's label."
              },
              "opera": {
                "version_added": true
              }
            }
          }
        },
        "theme_icons": {
          "__compat": {
            "support": {
              "chrome": {
                "version_added": false
              },
              "edge": {
                "version_added": false
              },
              "firefox": {
                "version_added": "56"
              },
              "firefox_android": {
                "version_added": false
              },
              "opera": {
                "version_added": false
              }
            }
          }
        }
      }
    }
  }
}