diff --git a/src/scripts/options.js b/src/scripts/options.js
index 0786099..08223f2 100644
--- a/src/scripts/options.js
+++ b/src/scripts/options.js
@@ -19,6 +19,9 @@ storage.get("extract", function(resp) {
 });
 
 urlInput.addEventListener("blur", function(e) {
+  if (this.value.endsWith("/")) {
+    this.value = this.value.substring(0, this.value.length - 1);
+  }
   var value = this.value;
   storage.set({ url: value }, function() {
     message.textContent = ext.i18n.getMessage("URLChanged");