diff --git a/background.js b/background.js
index eee9895..b737499 100644
--- a/background.js
+++ b/background.js
@@ -19,6 +19,14 @@
 const defaultHosts = "<all_urls>";
 
 let appCode = function (){
+  let clearSelect = function()
+  {
+    if (window.getSelection) {window.getSelection().removeAllRanges()}
+    else if
+      (document.selection) {
+        document.selection.empty()
+      }
+  }
   let minValue = 75
   let maxValue = 150
   let time = 0
@@ -46,8 +54,11 @@ let appCode = function (){
         }
         text = prompt("[PrivateKeyboard]\n\nEnter text for the " + inputType + " field:", e.target.value)
       }
-      e.target.value = text
+      if (text !== null) {
+        e.target.value = text
+      }
       last = e.target
+      clearSelect()
       time = Date.now()
     }
 
diff --git a/settings/options.html b/settings/options.html
index 41d76a1..b5efcbe 100644
--- a/settings/options.html
+++ b/settings/options.html
@@ -9,6 +9,9 @@
   <body>
 
     <form>
+        <input type="checkbox" id="usePrompt">
+        <label for="usePrompt">Use prompt() dialogs on single-line inputs. This option will reveal typed passwords and may break some websites, but allows for faster typing and less CPU usage.</label>
+        <br>
         <input type="checkbox" id="whitelistLAN">
         <label for="whitelistLAN">Whitelist private IP + localhost range hostnames (e.g. routers)</label>
         <h1>Trusted domains (comma delimited)</h1>
