add firefox extension template

externs/webextension_polyfill/management/Static.hx

@@ -0,0 +1,46 @@
+package webextension_polyfill.management;
+
+typedef Static = {
+	/**
+		Returns a list of information about installed extensions.
+	**/
+	function getAll():js.lib.Promise<Array<ExtensionInfo>>;
+	/**
+		Returns information about the installed extension that has the given ID.
+	**/
+	function get(id:String):js.lib.Promise<ExtensionInfo>;
+	/**
+		Installs and enables a theme extension from the given url.
+	**/
+	function install(options:InstallOptionsType):js.lib.Promise<InstallCallbackResultType>;
+	/**
+		Returns information about the calling extension. Note: This function can be used without requesting the 'management'
+		permission in the manifest.
+	**/
+	function getSelf():js.lib.Promise<ExtensionInfo>;
+	/**
+		Uninstalls the calling extension. Note: This function can be used without requesting the 'management' permission in the
+		manifest.
+	**/
+	function uninstallSelf(?options:UninstallSelfOptionsType):js.lib.Promise<ts.Undefined>;
+	/**
+		Enables or disables the given add-on.
+	**/
+	function setEnabled(id:String, enabled:Bool):js.lib.Promise<ts.Undefined>;
+	/**
+		Fired when an addon has been disabled.
+	**/
+	var onDisabled : webextension_polyfill.events.Event<(info:ExtensionInfo) -> Void>;
+	/**
+		Fired when an addon has been enabled.
+	**/
+	var onEnabled : webextension_polyfill.events.Event<(info:ExtensionInfo) -> Void>;
+	/**
+		Fired when an addon has been installed.
+	**/
+	var onInstalled : webextension_polyfill.events.Event<(info:ExtensionInfo) -> Void>;
+	/**
+		Fired when an addon has been uninstalled.
+	**/
+	var onUninstalled : webextension_polyfill.events.Event<(info:ExtensionInfo) -> Void>;
+};