diff --git a/lib/common/parse-features-string.js b/lib/common/parse-features-string.js
index 2c74c3463dc..a700617e6c9 100644
--- a/lib/common/parse-features-string.js
+++ b/lib/common/parse-features-string.js
@@ -1,12 +1,11 @@
 // parses a feature string that has the format used in window.open()
-// - `str` input string
+// - `features` input string
 // - `emit` function(key, value) - called for each parsed KV
 module.exports = function parseFeaturesString (features, emit) {
   // split the string by ','
   features.split(/,\s*/).forEach((feature) => {
-    // expected form is either a key by itself (true boolean flag)
-    // or a key/value, in the form of 'key=value'
-    // split the tokens by '='
+    // expected form is either a key by itself or a key/value pair in the form of
+    // 'key=value'
     let [key, value] = feature.split(/\s*=/)
     if (!key) return
 
diff --git a/lib/renderer/override.js b/lib/renderer/override.js
index 8c00661ddbe..6b5e0e1615d 100644
--- a/lib/renderer/override.js
+++ b/lib/renderer/override.js
@@ -89,7 +89,7 @@ if (process.guestInstanceId == null) {
 
 // Make the browser window or guest view emit "new-window" event.
 window.open = function (url, frameName, features) {
-  var feature, guestId, i, j, len, len1, name, options, ref1, ref2, value, additionalFeatures
+  var guestId, j, len1, name, options, additionalFeatures
   if (frameName == null) {
     frameName = ''
   }