diff --git a/src/browser.js b/src/browser.js
index ac3f7e13..f1c85d11 100644
--- a/src/browser.js
+++ b/src/browser.js
@@ -213,9 +213,15 @@ function load() {
 	}
 
 	// If debug isn't set in LS, and we're in Electron, try to load $DEBUG
-	if (!r && typeof process !== 'undefined' && 'env' in process) {
-		r = process.env.DEBUG;
+	// process.env is undefined in sometimes, and it will throw a exception
+	try {
+		if (!r && typeof process !== 'undefined' && 'env' in process) {
+			r = process.env.DEBUG;
+		}
+	} catch(error) {
+		// Browser throw `process.env is undefined`
 	}
+	
 
 	return r;
 }