From 4cec4f066dfcf23fe787308ccc6a1d29ea6c3f5d Mon Sep 17 00:00:00 2001
From: Kegsay <kegsay@gmail.com>
Date: Tue, 6 Jun 2017 12:38:06 +0100
Subject: [PATCH] Fix #4191: add defaults to avoid throwing (#4195)

---
 src/vector/platform/WebPlatform.js | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/vector/platform/WebPlatform.js b/src/vector/platform/WebPlatform.js
index 8397a7f70..b9e941e63 100644
--- a/src/vector/platform/WebPlatform.js
+++ b/src/vector/platform/WebPlatform.js
@@ -160,8 +160,8 @@ export default class WebPlatform extends VectorBasePlatform {
         const appName = u.format();
 
         const ua = new UAParser();
-        const browserName = ua.getBrowser().name;
-        const osName = ua.getOS().name;
+        const browserName = ua.getBrowser().name || "unknown browser";
+        const osName = ua.getOS().name || "unknown os";
         return _t('%(appName)s via %(browserName)s on %(osName)s', {appName: appName, browserName: browserName, osName: osName});
     }