formatted code

lib/frame-tree/bg/frame-tree.js

@@ -42,7 +42,7 @@ this.FrameTree = (() => {
 				};
 				browser.runtime.onMessage.addListener(onMessage);
 				browser.tabs.sendMessage(tabId, { method: "FrameTree.initRequest", windowId: "0", index: 0 })
-					.catch(() => {/* ignored */ });
+					.catch(() => { /* ignored */ });
 			});
 		}
 	};