From e911d2772c3c8620c0d6207165f1000256a1ae5c Mon Sep 17 00:00:00 2001
From: Shin'ya Ueoka <ueokande@i-beam.org>
Date: Mon, 4 Feb 2019 15:11:34 +0900
Subject: [PATCH] Show alert on opening about:home

---
 src/background/usecases/operation.js | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/background/usecases/operation.js b/src/background/usecases/operation.js
index 480dd08..73e4111 100644
--- a/src/background/usecases/operation.js
+++ b/src/background/usecases/operation.js
@@ -193,6 +193,10 @@ export default class OperationInteractor {
     let tab = await this.tabPresenter.getCurrent();
     let result = await browser.browserSettings.homepageOverride.get({});
     let us = urls.homepageUrls(result.value);
+    if (us.length === 1 && us[0] === 'about:home') {
+      // eslint-disable-next-line max-len
+      throw new Error('Cannot open Firefox Home (about:home) by WebExnteions, set your custom URLs');
+    }
     if (us.length === 1 && !newTab) {
       return this.tabPresenter.open(us[0], tab.id);
     }