diff --git a/app/common/lib/formatUtil.js b/app/common/lib/formatUtil.js
index 3525d1e33ea..863febc4502 100644
--- a/app/common/lib/formatUtil.js
+++ b/app/common/lib/formatUtil.js
@@ -47,7 +47,7 @@ const defaultOrderLookup = (value) => {
  * Accelerator reference: https://github.com/electron/electron/blob/master/docs/api/accelerator.md
  */
 module.exports.formatAccelerator = (accelerator) => {
-  let result = accelerator
+  let result
   let splitResult = accelerator.split('+')
   // sort in proper order, based on OS
   // also, replace w/ name or symbol
diff --git a/app/common/state/navigationBarState.js b/app/common/state/navigationBarState.js
index bfe5c63d1e4..4dc33923ab2 100644
--- a/app/common/state/navigationBarState.js
+++ b/app/common/state/navigationBarState.js
@@ -253,7 +253,7 @@ const api = {
     }
     if (selected) {
       // selection implies focus
-      state = state = api.setFocused(state, tabId, true)
+      state = api.setFocused(state, tabId, true)
     }
     return state.setIn(path.push('selected'), selected)
   },
diff --git a/app/renderer/components/preferences/extensionsTab.js b/app/renderer/components/preferences/extensionsTab.js
index ce2fd7c3da0..af7c5789578 100644
--- a/app/renderer/components/preferences/extensionsTab.js
+++ b/app/renderer/components/preferences/extensionsTab.js
@@ -113,7 +113,7 @@ class ExtensionsTab extends ImmutableComponent {
           headings={['icon', 'name', 'description', 'version', 'enabled'] /* 'exclude' */}
           columnClassNames={this.columnClassNames}
           rowClassNames={
-            this.props.extensions.map(entry => (entry = css(styles.extensionsRow))).toJS()
+            this.props.extensions.map(entry => css(styles.extensionsRow)).toJS()
           }
           rows={this.props.extensions.map(entry => this.getRow(entry))} />
       </main>
diff --git a/js/contextMenus.js b/js/contextMenus.js
index 50079596af9..7095bd4a798 100644
--- a/js/contextMenus.js
+++ b/js/contextMenus.js
@@ -1288,7 +1288,7 @@ function onUrlBarContextMenu (e) {
 
 function onFindBarContextMenu (e) {
   e.stopPropagation()
-  const findBarMenu = Menu.buildFromTemplate(findBarTemplateInit(e))
+  const findBarMenu = Menu.buildFromTemplate(findBarTemplateInit())
   findBarMenu.popup(getCurrentWindow())
 }
 
diff --git a/js/lib/debounce.js b/js/lib/debounce.js
index 0e676f5414a..cfcffe46446 100644
--- a/js/lib/debounce.js
+++ b/js/lib/debounce.js
@@ -8,8 +8,8 @@ function debounce (fn, bufferInterval, ...args) {
   let timeout
   return (...args2) => {
     clearTimeout(timeout)
-    let a = args || []
-    if (args2 && args2.constructor === Array) {
+    let a = args
+    if (args2.constructor === Array) {
       a = a.concat(args2)
     }
     timeout = setTimeout(fn.apply.bind(fn, this, a), bufferInterval)
diff --git a/js/lib/urlutil.js b/js/lib/urlutil.js
index 79eab2c0128..9bacb12dec0 100644
--- a/js/lib/urlutil.js
+++ b/js/lib/urlutil.js
@@ -109,7 +109,7 @@ const UrlUtil = {
     // - starts with "?" or "."
     // - contains "? "
     // - ends with "." (and was not preceded by a domain or /)
-    const case2Reg = /(^\?)|(\?.+\s)|(^\.)|(^[^.+..+]*[^/]*\.$)/
+    const case2Reg = /(^\?)|(\?.+\s)|(^\.)|(^[^.+]*[^/]*\.$)/
     // for cases, pure string
     const case3Reg = /[?./\s:]/
     // for cases, data:uri, view-source:uri and about
diff --git a/js/state/userPrefs.js b/js/state/userPrefs.js
index 1e4ea9d3c98..13f1aa10254 100644
--- a/js/state/userPrefs.js
+++ b/js/state/userPrefs.js
@@ -10,14 +10,15 @@ let registeredPrivateSessions = {}
 const setUserPrefType = (ses, path, value) => {
   switch (typeof value) {
     case 'object':
-      ses.userPrefs.setDictionaryPref(path, value)
+      if (Array.isArray(value)) {
+        ses.userPrefs.setListPref(path, value)
+      } else {
+        ses.userPrefs.setDictionaryPref(path, value)
+      }
       break
     case 'string':
       ses.userPrefs.setStringPref(path, value)
       break
-    case 'array':
-      ses.userPrefs.setListPref(path, value)
-      break
     case 'number':
       if ((/^(\d+(\.\d*)?|\.\d+)(e[+-]?\d+)?$/i).test(value.to_s())) {
         ses.userPrefs.setDoublePref(path, value)
diff --git a/package.json b/package.json
index 4cf2af266b5..9b88391396a 100644
--- a/package.json
+++ b/package.json
@@ -108,7 +108,6 @@
     "lru-cache": "^1.0.0",
     "moment": "^2.15.1",
     "niceware": "^1.0.4",
-    "normalize-url": "^1.7.0",
     "parse-torrent": "^5.8.1",
     "prettier-bytes": "^1.0.3",
     "prop-types": "^15.5.6",
@@ -119,8 +118,6 @@
     "react-dnd": "^2.1.4",
     "react-dnd-html5-backend": "^2.1.2",
     "react-dom": "^15.5.4",
-    "string.prototype.endswith": "^0.2.0",
-    "string.prototype.startswith": "^0.2.0",
     "tablesort": "5.0.0",
     "tldjs": "1.6.2",
     "tracking-protection": "1.1.x",