diff --git a/Dockerfile b/Dockerfile
index d06f5377b..be0a328fe 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM node:6
+FROM node:7
 MAINTAINER kumavis
 
 # setup app dir
diff --git a/app/scripts/account-import-strategies/index.js b/app/scripts/account-import-strategies/index.js
index d5124eb7f..96e2b5912 100644
--- a/app/scripts/account-import-strategies/index.js
+++ b/app/scripts/account-import-strategies/index.js
@@ -4,7 +4,7 @@ const ethUtil = require('ethereumjs-util')
 
 const accountImporter = {
 
-  importAccount(strategy, args) {
+  importAccount (strategy, args) {
     try {
       const importer = this.strategies[strategy]
       const privateKeyHex = importer.apply(null, args)
diff --git a/app/scripts/background.js b/app/scripts/background.js
index 7211f1e0c..58f8e7556 100644
--- a/app/scripts/background.js
+++ b/app/scripts/background.js
@@ -41,10 +41,10 @@ asyncQ.waterfall([
 // State and Persistence
 //
 
-function loadStateFromPersistence() {
+function loadStateFromPersistence () {
   // migrations
-  let migrator = new Migrator({ migrations })
-  let initialState = migrator.generateInitialState(firstTimeState)
+  const migrator = new Migrator({ migrations })
+  const initialState = migrator.generateInitialState(firstTimeState)
   return asyncQ.waterfall([
     // read from disk
     () => Promise.resolve(diskStore.getState() || initialState),
@@ -61,7 +61,6 @@ function loadStateFromPersistence() {
 }
 
 function setupController (initState) {
-
   //
   // MetaMask Controller
   //
@@ -85,8 +84,8 @@ function setupController (initState) {
     diskStore
   )
 
-  function versionifyData(state) {
-    let versionedData = diskStore.getState()
+  function versionifyData (state) {
+    const versionedData = diskStore.getState()
     versionedData.data = state
     return versionedData
   }
@@ -138,7 +137,6 @@ function setupController (initState) {
   }
 
   return Promise.resolve()
-
 }
 
 //
diff --git a/app/scripts/contentscript.js b/app/scripts/contentscript.js
index 4d7e682d3..f7237b32e 100644
--- a/app/scripts/contentscript.js
+++ b/app/scripts/contentscript.js
@@ -77,7 +77,7 @@ function doctypeCheck () {
   }
 }
 
-function suffixCheck() {
+function suffixCheck () {
   var prohibitedTypes = ['xml', 'pdf']
   var currentUrl = window.location.href
   var currentRegex
diff --git a/app/scripts/controllers/address-book.js b/app/scripts/controllers/address-book.js
index c66eb2bd4..6fb4ee114 100644
--- a/app/scripts/controllers/address-book.js
+++ b/app/scripts/controllers/address-book.js
@@ -39,11 +39,11 @@ class AddressBookController {
   // pushed object is an object of two fields. Current behavior does not set an
   // upper limit to the number of addresses.
   _addToAddressBook (address, name) {
-    let addressBook = this._getAddressBook()
-    let identities = this._getIdentities()
+    const addressBook = this._getAddressBook()
+    const identities = this._getIdentities()
 
-    let addressBookIndex = addressBook.findIndex((element) => { return element.address.toLowerCase() === address.toLowerCase() || element.name === name })
-    let identitiesIndex = Object.keys(identities).findIndex((element) => { return element.toLowerCase() === address.toLowerCase() })
+    const addressBookIndex = addressBook.findIndex((element) => { return element.address.toLowerCase() === address.toLowerCase() || element.name === name })
+    const identitiesIndex = Object.keys(identities).findIndex((element) => { return element.toLowerCase() === address.toLowerCase() })
     // trigger this condition if we own this address--no need to overwrite.
     if (identitiesIndex !== -1) {
       return Promise.resolve(addressBook)
diff --git a/app/scripts/controllers/currency.js b/app/scripts/controllers/currency.js
index c4904f8ac..fb130ed76 100644
--- a/app/scripts/controllers/currency.js
+++ b/app/scripts/controllers/currency.js
@@ -51,9 +51,11 @@ class CurrencyController {
       this.setConversionRate(Number(parsedResponse.ticker.price))
       this.setConversionDate(Number(parsedResponse.timestamp))
     }).catch((err) => {
-      console.warn('MetaMask - Failed to query currency conversion.')
-      this.setConversionRate(0)
-      this.setConversionDate('N/A')
+      if (err) {
+        console.warn('MetaMask - Failed to query currency conversion.')
+        this.setConversionRate(0)
+        this.setConversionDate('N/A')
+      }
     })
   }
 
diff --git a/app/scripts/controllers/preferences.js b/app/scripts/controllers/preferences.js
index c7f675a41..7212c7c43 100644
--- a/app/scripts/controllers/preferences.js
+++ b/app/scripts/controllers/preferences.js
@@ -36,8 +36,8 @@ class PreferencesController {
   }
 
   addToFrequentRpcList (_url) {
-    let rpcList = this.getFrequentRpcList()
-    let index = rpcList.findIndex((element) => { return element === _url })
+    const rpcList = this.getFrequentRpcList()
+    const index = rpcList.findIndex((element) => { return element === _url })
     if (index !== -1) {
       rpcList.splice(index, 1)
     }
@@ -53,13 +53,9 @@ class PreferencesController {
   getFrequentRpcList () {
     return this.store.getState().frequentRpcList
   }
-
   //
   // PRIVATE METHODS
   //
-
-
-
 }
 
 module.exports = PreferencesController
diff --git a/app/scripts/first-time-state.js b/app/scripts/first-time-state.js
index 3196981ba..87a7bb7b5 100644
--- a/app/scripts/first-time-state.js
+++ b/app/scripts/first-time-state.js
@@ -8,4 +8,4 @@ module.exports = {
       type: 'testnet',
     },
   },
-}
\ No newline at end of file
+}
diff --git a/app/scripts/keyring-controller.js b/app/scripts/keyring-controller.js
index 16df6efa6..5b3c80e40 100644
--- a/app/scripts/keyring-controller.js
+++ b/app/scripts/keyring-controller.js
@@ -187,7 +187,7 @@ class KeyringController extends EventEmitter {
     .then((accounts) => {
       switch (type) {
         case 'Simple Key Pair':
-          let isNotIncluded = !accounts.find((key) => key === newAccount[0] || key === ethUtil.stripHexPrefix(newAccount[0]))
+          const isNotIncluded = !accounts.find((key) => key === newAccount[0] || key === ethUtil.stripHexPrefix(newAccount[0]))
           return (isNotIncluded) ? Promise.resolve(newAccount) : Promise.reject(new Error('The account you\'re are trying to import is a duplicate'))
         default:
           return Promise.resolve(newAccount)
@@ -582,7 +582,7 @@ class KeyringController extends EventEmitter {
     })
   }
 
-  _updateMemStoreKeyrings() {
+  _updateMemStoreKeyrings () {
     Promise.all(this.keyrings.map(this.displayForKeyring))
     .then((keyrings) => {
       this.memStore.updateState({ keyrings })
diff --git a/app/scripts/lib/buy-eth-url.js b/app/scripts/lib/buy-eth-url.js
index 957a00211..b9dde3c28 100644
--- a/app/scripts/lib/buy-eth-url.js
+++ b/app/scripts/lib/buy-eth-url.js
@@ -1,6 +1,6 @@
 module.exports = getBuyEthUrl
 
-function getBuyEthUrl({ network, amount, address }){
+function getBuyEthUrl ({ network, amount, address }) {
   let url
   switch (network) {
     case '1':
diff --git a/app/scripts/lib/eth-store.js b/app/scripts/lib/eth-store.js
index 243253df2..6f04a9dd6 100644
--- a/app/scripts/lib/eth-store.js
+++ b/app/scripts/lib/eth-store.js
@@ -10,7 +10,7 @@
 const async = require('async')
 const EthQuery = require('eth-query')
 const ObservableStore = require('obs-store')
-function noop() {}
+function noop () {}
 
 
 class EthereumStore extends ObservableStore {
diff --git a/app/scripts/lib/inpage-provider.js b/app/scripts/lib/inpage-provider.js
index 92936de2f..e5e398e24 100644
--- a/app/scripts/lib/inpage-provider.js
+++ b/app/scripts/lib/inpage-provider.js
@@ -85,7 +85,7 @@ MetamaskInpageProvider.prototype.send = function (payload) {
       break
 
     case 'net_version':
-      let networkVersion = self.publicConfigStore.getState().networkVersion
+      const networkVersion = self.publicConfigStore.getState().networkVersion
       result = networkVersion
       break
 
@@ -125,7 +125,7 @@ function eachJsonMessage (payload, transformFn) {
   }
 }
 
-function logStreamDisconnectWarning(remoteLabel, err){
+function logStreamDisconnectWarning (remoteLabel, err) {
   let warningMsg = `MetamaskInpageProvider - lost connection to ${remoteLabel}`
   if (err) warningMsg += '\n' + err.stack
   console.warn(warningMsg)
diff --git a/app/scripts/lib/message-manager.js b/app/scripts/lib/message-manager.js
index 711d5f159..f52e048e0 100644
--- a/app/scripts/lib/message-manager.js
+++ b/app/scripts/lib/message-manager.js
@@ -4,7 +4,7 @@ const ethUtil = require('ethereumjs-util')
 const createId = require('./random-id')
 
 
-module.exports = class MessageManager extends EventEmitter{
+module.exports = class MessageManager extends EventEmitter {
   constructor (opts) {
     super()
     this.memStore = new ObservableStore({
@@ -108,7 +108,7 @@ module.exports = class MessageManager extends EventEmitter{
 
 }
 
-function normalizeMsgData(data) {
+function normalizeMsgData (data) {
   if (data.slice(0, 2) === '0x') {
     // data is already hex
     return data
diff --git a/app/scripts/lib/migrator/index.js b/app/scripts/lib/migrator/index.js
index 312345263..c40c347b5 100644
--- a/app/scripts/lib/migrator/index.js
+++ b/app/scripts/lib/migrator/index.js
@@ -3,17 +3,17 @@ const asyncQ = require('async-q')
 class Migrator {
 
   constructor (opts = {}) {
-    let migrations = opts.migrations || []
+    const migrations = opts.migrations || []
     this.migrations = migrations.sort((a, b) => a.version - b.version)
-    let lastMigration = this.migrations.slice(-1)[0]
+    const lastMigration = this.migrations.slice(-1)[0]
     // use specified defaultVersion or highest migration version
     this.defaultVersion = opts.defaultVersion || (lastMigration && lastMigration.version) || 0
   }
 
   // run all pending migrations on meta in place
   migrateData (versionedData = this.generateInitialState()) {
-    let remaining = this.migrations.filter(migrationIsPending)
-    
+    const remaining = this.migrations.filter(migrationIsPending)
+
     return (
       asyncQ.eachSeries(remaining, (migration) => this.runMigration(versionedData, migration))
       .then(() => versionedData)
@@ -21,12 +21,12 @@ class Migrator {
 
     // migration is "pending" if hit has a higher
     // version number than currentVersion
-    function migrationIsPending(migration) {
+    function migrationIsPending (migration) {
       return migration.version > versionedData.meta.version
     }
   }
 
-  runMigration(versionedData, migration) {
+  runMigration (versionedData, migration) {
     return (
       migration.migrate(versionedData)
       .then((versionedData) => {
diff --git a/app/scripts/lib/notification-manager.js b/app/scripts/lib/notification-manager.js
index 55e5b8dd2..799282f6d 100644
--- a/app/scripts/lib/notification-manager.js
+++ b/app/scripts/lib/notification-manager.js
@@ -71,4 +71,4 @@ class NotificationManager {
 
 }
 
-module.exports = NotificationManager
\ No newline at end of file
+module.exports = NotificationManager
diff --git a/app/scripts/lib/personal-message-manager.js b/app/scripts/lib/personal-message-manager.js
index bbc978446..6602f5aa8 100644
--- a/app/scripts/lib/personal-message-manager.js
+++ b/app/scripts/lib/personal-message-manager.js
@@ -5,7 +5,7 @@ const createId = require('./random-id')
 const hexRe = /^[0-9A-Fa-f]+$/g
 
 
-module.exports = class PersonalMessageManager extends EventEmitter{
+module.exports = class PersonalMessageManager extends EventEmitter {
   constructor (opts) {
     super()
     this.memStore = new ObservableStore({
@@ -108,7 +108,7 @@ module.exports = class PersonalMessageManager extends EventEmitter{
     this.emit('updateBadge')
   }
 
-  normalizeMsgData(data) {
+  normalizeMsgData (data) {
     try {
       const stripped = ethUtil.stripHexPrefix(data)
       if (stripped.match(hexRe)) {
diff --git a/app/scripts/lib/tx-utils.js b/app/scripts/lib/tx-utils.js
index e8e23f8b5..084ca3721 100644
--- a/app/scripts/lib/tx-utils.js
+++ b/app/scripts/lib/tx-utils.js
@@ -75,14 +75,14 @@ module.exports = class txProviderUtils {
   }
 
   fillInTxParams (txParams, cb) {
-    let fromAddress = txParams.from
-    let reqs = {}
+    const fromAddress = txParams.from
+    const reqs = {}
 
     if (isUndef(txParams.gas)) reqs.gas = (cb) => this.query.estimateGas(txParams, cb)
     if (isUndef(txParams.gasPrice)) reqs.gasPrice = (cb) => this.query.gasPrice(cb)
     if (isUndef(txParams.nonce)) reqs.nonce = (cb) => this.query.getTransactionCount(fromAddress, 'pending', cb)
 
-    async.parallel(reqs, function(err, result) {
+    async.parallel(reqs, function (err, result) {
       if (err) return cb(err)
       // write results to txParams obj
       Object.assign(txParams, result)
@@ -123,14 +123,14 @@ module.exports = class txProviderUtils {
 
 // util
 
-function isUndef(value) {
+function isUndef (value) {
   return value === undefined
 }
 
-function bnToHex(inputBn) {
+function bnToHex (inputBn) {
   return ethUtil.addHexPrefix(inputBn.toString(16))
 }
 
-function hexToBn(inputHex) {
+function hexToBn (inputHex) {
   return new BN(ethUtil.stripHexPrefix(inputHex), 16)
 }
diff --git a/app/scripts/metamask-controller.js b/app/scripts/metamask-controller.js
index 2b8fc9cb8..b91b5efe8 100644
--- a/app/scripts/metamask-controller.js
+++ b/app/scripts/metamask-controller.js
@@ -32,7 +32,7 @@ module.exports = class MetamaskController extends EventEmitter {
   constructor (opts) {
     super()
     this.opts = opts
-    let initState = opts.initState || {}
+    const initState = opts.initState || {}
 
     // platform-specific api
     this.platform = opts.platform
@@ -161,8 +161,7 @@ module.exports = class MetamaskController extends EventEmitter {
   //
 
   initializeProvider () {
-
-    let provider = MetaMaskProvider({
+    const provider = MetaMaskProvider({
       static: {
         eth_syncing: false,
         web3_clientVersion: `MetaMask/v${version}`,
@@ -170,8 +169,8 @@ module.exports = class MetamaskController extends EventEmitter {
       rpcUrl: this.configManager.getCurrentRpcAddress(),
       // account mgmt
       getAccounts: (cb) => {
-        let selectedAddress = this.preferencesController.getSelectedAddress()
-        let result = selectedAddress ? [selectedAddress] : []
+        const selectedAddress = this.preferencesController.getSelectedAddress()
+        const result = selectedAddress ? [selectedAddress] : []
         cb(null, result)
       },
       // tx signing
@@ -196,7 +195,7 @@ module.exports = class MetamaskController extends EventEmitter {
       publicConfigStore
     )
 
-    function selectPublicState(state) {
+    function selectPublicState (state) {
       const result = { selectedAddress: undefined }
       try {
         result.selectedAddress = state.PreferencesController.selectedAddress
@@ -253,56 +252,56 @@ module.exports = class MetamaskController extends EventEmitter {
 
     return {
       // etc
-      getState:              (cb) => cb(null, this.getState()),
-      setProviderType:       this.setProviderType.bind(this),
-      useEtherscanProvider:  this.useEtherscanProvider.bind(this),
-      setCurrentCurrency:    this.setCurrentCurrency.bind(this),
-      markAccountsFound:     this.markAccountsFound.bind(this),
+      getState: (cb) => cb(null, this.getState()),
+      setProviderType: this.setProviderType.bind(this),
+      useEtherscanProvider: this.useEtherscanProvider.bind(this),
+      setCurrentCurrency: this.setCurrentCurrency.bind(this),
+      markAccountsFound: this.markAccountsFound.bind(this),
       // coinbase
       buyEth: this.buyEth.bind(this),
       // shapeshift
       createShapeShiftTx: this.createShapeShiftTx.bind(this),
 
       // primary HD keyring management
-      addNewAccount:              this.addNewAccount.bind(this),
-      placeSeedWords:             this.placeSeedWords.bind(this),
-      clearSeedWordCache:         this.clearSeedWordCache.bind(this),
-      importAccountWithStrategy:  this.importAccountWithStrategy.bind(this),
+      addNewAccount: this.addNewAccount.bind(this),
+      placeSeedWords: this.placeSeedWords.bind(this),
+      clearSeedWordCache: this.clearSeedWordCache.bind(this),
+      importAccountWithStrategy: this.importAccountWithStrategy.bind(this),
 
       // vault management
       submitPassword: this.submitPassword.bind(this),
 
       // PreferencesController
-      setSelectedAddress:        nodeify(preferencesController.setSelectedAddress).bind(preferencesController),
-      setDefaultRpc:             nodeify(this.setDefaultRpc).bind(this),
-      setCustomRpc:              nodeify(this.setCustomRpc).bind(this),
+      setSelectedAddress: nodeify(preferencesController.setSelectedAddress).bind(preferencesController),
+      setDefaultRpc: nodeify(this.setDefaultRpc).bind(this),
+      setCustomRpc: nodeify(this.setCustomRpc).bind(this),
 
       // AddressController
-      setAddressBook:           nodeify(addressBookController.setAddressBook).bind(addressBookController),
+      setAddressBook: nodeify(addressBookController.setAddressBook).bind(addressBookController),
 
       // KeyringController
-      setLocked:                 nodeify(keyringController.setLocked).bind(keyringController),
+      setLocked: nodeify(keyringController.setLocked).bind(keyringController),
       createNewVaultAndKeychain: nodeify(keyringController.createNewVaultAndKeychain).bind(keyringController),
-      createNewVaultAndRestore:  nodeify(keyringController.createNewVaultAndRestore).bind(keyringController),
-      addNewKeyring:             nodeify(keyringController.addNewKeyring).bind(keyringController),
-      saveAccountLabel:          nodeify(keyringController.saveAccountLabel).bind(keyringController),
-      exportAccount:             nodeify(keyringController.exportAccount).bind(keyringController),
+      createNewVaultAndRestore: nodeify(keyringController.createNewVaultAndRestore).bind(keyringController),
+      addNewKeyring: nodeify(keyringController.addNewKeyring).bind(keyringController),
+      saveAccountLabel: nodeify(keyringController.saveAccountLabel).bind(keyringController),
+      exportAccount: nodeify(keyringController.exportAccount).bind(keyringController),
 
       // txManager
-      approveTransaction:          txManager.approveTransaction.bind(txManager),
-      cancelTransaction:           txManager.cancelTransaction.bind(txManager),
+      approveTransaction: txManager.approveTransaction.bind(txManager),
+      cancelTransaction: txManager.cancelTransaction.bind(txManager),
       updateAndApproveTransaction: this.updateAndApproveTx.bind(this),
 
       // messageManager
-      signMessage:           nodeify(this.signMessage).bind(this),
-      cancelMessage:         this.cancelMessage.bind(this),
+      signMessage: nodeify(this.signMessage).bind(this),
+      cancelMessage: this.cancelMessage.bind(this),
 
       // personalMessageManager
-      signPersonalMessage:   nodeify(this.signPersonalMessage).bind(this),
-      cancelPersonalMessage:         this.cancelPersonalMessage.bind(this),
+      signPersonalMessage: nodeify(this.signPersonalMessage).bind(this),
+      cancelPersonalMessage: this.cancelPersonalMessage.bind(this),
 
       // notices
-      checkNotices:   noticeController.updateNoticesList.bind(noticeController),
+      checkNotices: noticeController.updateNoticesList.bind(noticeController),
       markNoticeRead: noticeController.markNoticeRead.bind(noticeController),
     }
   }
@@ -441,7 +440,7 @@ module.exports = class MetamaskController extends EventEmitter {
   }
 
   newUnsignedMessage (msgParams, cb) {
-    let msgId = this.messageManager.addUnapprovedMessage(msgParams)
+    const msgId = this.messageManager.addUnapprovedMessage(msgParams)
     this.sendUpdate()
     this.opts.showUnconfirmedMessage()
     this.messageManager.once(`${msgId}:finished`, (data) => {
@@ -461,7 +460,7 @@ module.exports = class MetamaskController extends EventEmitter {
       return cb(new Error('MetaMask Message Signature: from field is required.'))
     }
 
-    let msgId = this.personalMessageManager.addUnapprovedMessage(msgParams)
+    const msgId = this.personalMessageManager.addUnapprovedMessage(msgParams)
     this.sendUpdate()
     this.opts.showUnconfirmedMessage()
     this.personalMessageManager.once(`${msgId}:finished`, (data) => {
@@ -476,7 +475,7 @@ module.exports = class MetamaskController extends EventEmitter {
     })
   }
 
-  updateAndApproveTx(txMeta, cb) {
+  updateAndApproveTx (txMeta, cb) {
     log.debug(`MetaMaskController - updateAndApproveTx: ${JSON.stringify(txMeta)}`)
     const txManager = this.txManager
     txManager.updateTx(txMeta)
@@ -502,7 +501,7 @@ module.exports = class MetamaskController extends EventEmitter {
     })
   }
 
-  cancelMessage(msgId, cb) {
+  cancelMessage (msgId, cb) {
     const messageManager = this.messageManager
     messageManager.rejectMsg(msgId)
     if (cb && typeof cb === 'function') {
@@ -512,7 +511,7 @@ module.exports = class MetamaskController extends EventEmitter {
 
   // Prefixed Style Message Signing Methods:
   approvePersonalMessage (msgParams, cb) {
-    let msgId = this.personalMessageManager.addUnapprovedMessage(msgParams)
+    const msgId = this.personalMessageManager.addUnapprovedMessage(msgParams)
     this.sendUpdate()
     this.opts.showUnconfirmedMessage()
     this.personalMessageManager.once(`${msgId}:finished`, (data) => {
@@ -545,7 +544,7 @@ module.exports = class MetamaskController extends EventEmitter {
     })
   }
 
-  cancelPersonalMessage(msgId, cb) {
+  cancelPersonalMessage (msgId, cb) {
     const messageManager = this.personalMessageManager
     messageManager.rejectMsg(msgId)
     if (cb && typeof cb === 'function') {
@@ -559,13 +558,13 @@ module.exports = class MetamaskController extends EventEmitter {
     cb(null, this.getState())
   }
 
-  restoreOldVaultAccounts(migratorOutput) {
+  restoreOldVaultAccounts (migratorOutput) {
     const { serialized } = migratorOutput
     return this.keyringController.restoreKeyring(serialized)
     .then(() => migratorOutput)
   }
 
-  restoreOldLostAccounts(migratorOutput) {
+  restoreOldLostAccounts (migratorOutput) {
     const { lostAccounts } = migratorOutput
     if (lostAccounts) {
       this.configManager.setLostAccounts(lostAccounts.map(acct => acct.address))
diff --git a/app/scripts/migrations/002.js b/app/scripts/migrations/002.js
index 36a870342..b1d88f2ef 100644
--- a/app/scripts/migrations/002.js
+++ b/app/scripts/migrations/002.js
@@ -7,7 +7,7 @@ module.exports = {
   version,
 
   migrate: function (originalVersionedData) {
-    let versionedData = clone(originalVersionedData)
+    const versionedData = clone(originalVersionedData)
     versionedData.meta.version = version
     try {
       if (versionedData.data.config.provider.type === 'etherscan') {
diff --git a/app/scripts/migrations/003.js b/app/scripts/migrations/003.js
index 1893576ad..140f81d40 100644
--- a/app/scripts/migrations/003.js
+++ b/app/scripts/migrations/003.js
@@ -8,7 +8,7 @@ module.exports = {
   version,
 
   migrate: function (originalVersionedData) {
-    let versionedData = clone(originalVersionedData)
+    const versionedData = clone(originalVersionedData)
     versionedData.meta.version = version
     try {
       if (versionedData.data.config.provider.rpcTarget === oldTestRpc) {
diff --git a/app/scripts/migrations/004.js b/app/scripts/migrations/004.js
index 405d932f8..cd558300c 100644
--- a/app/scripts/migrations/004.js
+++ b/app/scripts/migrations/004.js
@@ -6,7 +6,7 @@ module.exports = {
   version,
 
   migrate: function (versionedData) {
-    let safeVersionedData = clone(versionedData)
+    const safeVersionedData = clone(versionedData)
     safeVersionedData.meta.version = version
     try {
       if (safeVersionedData.data.config.provider.type !== 'rpc') return Promise.resolve(safeVersionedData)
diff --git a/app/scripts/migrations/005.js b/app/scripts/migrations/005.js
index e4b84f460..f7b68dfe4 100644
--- a/app/scripts/migrations/005.js
+++ b/app/scripts/migrations/005.js
@@ -14,7 +14,7 @@ module.exports = {
   version,
 
   migrate: function (originalVersionedData) {
-    let versionedData = clone(originalVersionedData)
+    const versionedData = clone(originalVersionedData)
     versionedData.meta.version = version
     try {
       const state = versionedData.data
diff --git a/app/scripts/migrations/006.js b/app/scripts/migrations/006.js
index 94d1b6ecd..51ea6e3e7 100644
--- a/app/scripts/migrations/006.js
+++ b/app/scripts/migrations/006.js
@@ -13,7 +13,7 @@ module.exports = {
   version,
 
   migrate: function (originalVersionedData) {
-    let versionedData = clone(originalVersionedData)
+    const versionedData = clone(originalVersionedData)
     versionedData.meta.version = version
     try {
       const state = versionedData.data
diff --git a/app/scripts/migrations/007.js b/app/scripts/migrations/007.js
index 236e35224..d9887b9c8 100644
--- a/app/scripts/migrations/007.js
+++ b/app/scripts/migrations/007.js
@@ -13,7 +13,7 @@ module.exports = {
   version,
 
   migrate: function (originalVersionedData) {
-    let versionedData = clone(originalVersionedData)
+    const versionedData = clone(originalVersionedData)
     versionedData.meta.version = version
     try {
       const state = versionedData.data
diff --git a/app/scripts/migrations/008.js b/app/scripts/migrations/008.js
index cd5e95d22..da7cb2e60 100644
--- a/app/scripts/migrations/008.js
+++ b/app/scripts/migrations/008.js
@@ -13,7 +13,7 @@ module.exports = {
   version,
 
   migrate: function (originalVersionedData) {
-    let versionedData = clone(originalVersionedData)
+    const versionedData = clone(originalVersionedData)
     versionedData.meta.version = version
     try {
       const state = versionedData.data
diff --git a/app/scripts/migrations/009.js b/app/scripts/migrations/009.js
index 4612fefdc..f47db55ac 100644
--- a/app/scripts/migrations/009.js
+++ b/app/scripts/migrations/009.js
@@ -13,7 +13,7 @@ module.exports = {
   version,
 
   migrate: function (originalVersionedData) {
-    let versionedData = clone(originalVersionedData)
+    const versionedData = clone(originalVersionedData)
     versionedData.meta.version = version
     try {
       const state = versionedData.data
diff --git a/app/scripts/migrations/010.js b/app/scripts/migrations/010.js
index c0cc56ae4..e4b9ac07e 100644
--- a/app/scripts/migrations/010.js
+++ b/app/scripts/migrations/010.js
@@ -13,7 +13,7 @@ module.exports = {
   version,
 
   migrate: function (originalVersionedData) {
-    let versionedData = clone(originalVersionedData)
+    const versionedData = clone(originalVersionedData)
     versionedData.meta.version = version
     try {
       const state = versionedData.data
diff --git a/app/scripts/migrations/011.js b/app/scripts/migrations/011.js
index 0d5d6d307..782ec809d 100644
--- a/app/scripts/migrations/011.js
+++ b/app/scripts/migrations/011.js
@@ -12,7 +12,7 @@ module.exports = {
   version,
 
   migrate: function (originalVersionedData) {
-    let versionedData = clone(originalVersionedData)
+    const versionedData = clone(originalVersionedData)
     versionedData.meta.version = version
     try {
       const state = versionedData.data
diff --git a/app/scripts/migrations/012.js b/app/scripts/migrations/012.js
index 8361b3793..f69ccbb02 100644
--- a/app/scripts/migrations/012.js
+++ b/app/scripts/migrations/012.js
@@ -12,7 +12,7 @@ module.exports = {
   version,
 
   migrate: function (originalVersionedData) {
-    let versionedData = clone(originalVersionedData)
+    const versionedData = clone(originalVersionedData)
     versionedData.meta.version = version
     try {
       const state = versionedData.data
diff --git a/app/scripts/migrations/_multi-keyring.js b/app/scripts/migrations/_multi-keyring.js
index 04c966d4d..253aa3d9d 100644
--- a/app/scripts/migrations/_multi-keyring.js
+++ b/app/scripts/migrations/_multi-keyring.js
@@ -15,15 +15,15 @@ const KeyringController = require('../../app/scripts/lib/keyring-controller')
 const password = 'obviously not correct'
 
 module.exports = {
-  version,  
+  version,
 
   migrate: function (versionedData) {
     versionedData.meta.version = version
 
-    let store = new ObservableStore(versionedData.data)
-    let configManager = new ConfigManager({ store })
-    let idStoreMigrator = new IdentityStoreMigrator({ configManager })
-    let keyringController = new KeyringController({
+    const store = new ObservableStore(versionedData.data)
+    const configManager = new ConfigManager({ store })
+    const idStoreMigrator = new IdentityStoreMigrator({ configManager })
+    const keyringController = new KeyringController({
       configManager: configManager,
     })
 
@@ -46,6 +46,5 @@ module.exports = {
         return Promise.resolve(versionedData)
       })
     })
-
   },
 }
diff --git a/app/scripts/popup-core.js b/app/scripts/popup-core.js
index 1e5d70e8b..f9ac4d052 100644
--- a/app/scripts/popup-core.js
+++ b/app/scripts/popup-core.js
@@ -16,7 +16,6 @@ function initializePopup ({ container, connectionStream }, cb) {
     (cb) => connectToAccountManager(connectionStream, cb),
     (accountManager, cb) => launchMetamaskUi({ container, accountManager }, cb),
   ], cb)
-
 }
 
 function connectToAccountManager (connectionStream, cb) {
diff --git a/app/scripts/popup.js b/app/scripts/popup.js
index 0fbde54b3..5f17f0651 100644
--- a/app/scripts/popup.js
+++ b/app/scripts/popup.js
@@ -41,7 +41,7 @@ function closePopupIfOpen (windowType) {
   }
 }
 
-function displayCriticalError(err) {
+function displayCriticalError (err) {
   container.innerHTML = '<div class="critical-error">The MetaMask app failed to load: please open and close MetaMask again to restart.</div>'
   container.style.height = '80px'
   log.error(err.stack)
diff --git a/app/scripts/transaction-manager.js b/app/scripts/transaction-manager.js
index d7051b2cb..9f267160f 100644
--- a/app/scripts/transaction-manager.js
+++ b/app/scripts/transaction-manager.js
@@ -28,9 +28,9 @@ module.exports = class TransactionManager extends EventEmitter {
 
     // memstore is computed from a few different stores
     this._updateMemstore()
-    this.store.subscribe(() => this._updateMemstore() )
-    this.networkStore.subscribe(() => this._updateMemstore() )
-    this.preferencesStore.subscribe(() => this._updateMemstore() )
+    this.store.subscribe(() => this._updateMemstore())
+    this.networkStore.subscribe(() => this._updateMemstore())
+    this.preferencesStore.subscribe(() => this._updateMemstore())
   }
 
   getState () {
@@ -47,8 +47,8 @@ module.exports = class TransactionManager extends EventEmitter {
 
   // Returns the tx list
   getTxList () {
-    let network = this.getNetwork()
-    let fullTxList = this.getFullTxList()
+    const network = this.getNetwork()
+    const fullTxList = this.getFullTxList()
     return fullTxList.filter(txMeta => txMeta.metamaskNetworkId === network)
   }
 
@@ -64,10 +64,10 @@ module.exports = class TransactionManager extends EventEmitter {
 
   // Adds a tx to the txlist
   addTx (txMeta) {
-    let txCount = this.getTxCount()
-    let network = this.getNetwork()
-    let fullTxList = this.getFullTxList()
-    let txHistoryLimit = this.txHistoryLimit
+    const txCount = this.getTxCount()
+    const network = this.getNetwork()
+    const fullTxList = this.getFullTxList()
+    const txHistoryLimit = this.txHistoryLimit
 
     // checks if the length of the tx history is
     // longer then desired persistence limit
@@ -197,7 +197,7 @@ module.exports = class TransactionManager extends EventEmitter {
   }
 
   fillInTxParams (txId, cb) {
-    let txMeta = this.getTx(txId)
+    const txMeta = this.getTx(txId)
     this.txProviderUtils.fillInTxParams(txMeta.txParams, (err) => {
       if (err) return cb(err)
       this.updateTx(txMeta)
@@ -205,7 +205,7 @@ module.exports = class TransactionManager extends EventEmitter {
     })
   }
 
-  getChainId() {
+  getChainId () {
     const networkState = this.networkStore.getState()
     const getChainId = parseInt(networkState.network)
     if (Number.isNaN(getChainId)) {
@@ -242,7 +242,7 @@ module.exports = class TransactionManager extends EventEmitter {
   // receives a txHash records the tx as signed
   setTxHash (txId, txHash) {
     // Add the tx hash to the persisted meta-tx object
-    let txMeta = this.getTx(txId)
+    const txMeta = this.getTx(txId)
     txMeta.hash = txHash
     this.updateTx(txMeta)
   }
@@ -315,7 +315,7 @@ module.exports = class TransactionManager extends EventEmitter {
   }
 
   setTxStatusFailed (txId, reason) {
-    let txMeta = this.getTx(txId)
+    const txMeta = this.getTx(txId)
     txMeta.err = reason
     this.updateTx(txMeta)
     this._setTxStatus(txId, 'failed')
@@ -338,7 +338,7 @@ module.exports = class TransactionManager extends EventEmitter {
       var txHash = txMeta.hash
       var txId = txMeta.id
       if (!txHash) {
-        let errReason = {
+        const errReason = {
           errCode: 'No hash was provided',
           message: 'We had an error while submitting this transaction, please try again.',
         }
diff --git a/gulpfile.js b/gulpfile.js
index fe223adf1..21b925780 100644
--- a/gulpfile.js
+++ b/gulpfile.js
@@ -296,8 +296,6 @@ function bundleTask(opts) {
     return (
 
       bundler.bundle()
-      // log errors if they happen
-      .on('error', gutil.log.bind(gutil, 'Browserify Error'))
       // convert bundle stream to gulp vinyl stream
       .pipe(source(opts.filename))
       // inject variables into bundle
diff --git a/ui/app/accounts/import/index.js b/ui/app/accounts/import/index.js
index 96350852a..a0f0f9bdb 100644
--- a/ui/app/accounts/import/index.js
+++ b/ui/app/accounts/import/index.js
@@ -73,7 +73,7 @@ AccountImportSubview.prototype.render = function () {
   )
 }
 
-AccountImportSubview.prototype.renderImportView = function() {
+AccountImportSubview.prototype.renderImportView = function () {
   const props = this.props
   const state = this.state || {}
   const { type } = state
diff --git a/ui/app/actions.js b/ui/app/actions.js
index 18f341411..c15c9be7e 100644
--- a/ui/app/actions.js
+++ b/ui/app/actions.js
@@ -314,7 +314,7 @@ function importNewAccount (strategy, args) {
   }
 }
 
-function navigateToNewAccountScreen() {
+function navigateToNewAccountScreen () {
   return {
     type: this.NEW_ACCOUNT_SCREEN,
   }
@@ -665,7 +665,7 @@ function clearNotices () {
   }
 }
 
-function markAccountsFound() {
+function markAccountsFound () {
   log.debug(`background.markAccountsFound`)
   return callBackgroundThenUpdate(background.markAccountsFound)
 }
@@ -978,7 +978,7 @@ function callBackgroundThenUpdate (method, ...args) {
   }
 }
 
-function forceUpdateMetamaskState(dispatch){
+function forceUpdateMetamaskState (dispatch) {
   log.debug(`background.getState`)
   background.getState((err, newState) => {
     if (err) {
diff --git a/ui/app/app.js b/ui/app/app.js
index f3661568f..bbfd58588 100644
--- a/ui/app/app.js
+++ b/ui/app/app.js
@@ -561,5 +561,4 @@ App.prototype.renderCommonRpc = function (rpcList, provider) {
       })
     }
   })
-
 }
diff --git a/ui/app/components/ens-input.js b/ui/app/components/ens-input.js
index facf29d97..f1cf49998 100644
--- a/ui/app/components/ens-input.js
+++ b/ui/app/components/ens-input.js
@@ -24,7 +24,7 @@ EnsInput.prototype.render = function () {
     list: 'addresses',
     onChange: () => {
       const network = this.props.network
-      let resolverAddress = networkResolvers[network]
+      const resolverAddress = networkResolvers[network]
       if (!resolverAddress) return
 
       const recipient = document.querySelector('input[name="address"]').value
@@ -52,7 +52,7 @@ EnsInput.prototype.render = function () {
       [
         // Corresponds to the addresses owned.
         Object.keys(props.identities).map((key) => {
-          let identity = props.identities[key]
+          const identity = props.identities[key]
           return h('option', {
             value: identity.address,
             label: identity.name,
@@ -72,7 +72,7 @@ EnsInput.prototype.render = function () {
 
 EnsInput.prototype.componentDidMount = function () {
   const network = this.props.network
-  let resolverAddress = networkResolvers[network]
+  const resolverAddress = networkResolvers[network]
 
   if (resolverAddress) {
     const provider = web3.currentProvider
diff --git a/ui/app/components/notice.js b/ui/app/components/notice.js
index b85787033..3c8523daf 100644
--- a/ui/app/components/notice.js
+++ b/ui/app/components/notice.js
@@ -115,8 +115,9 @@ Notice.prototype.render = function () {
 Notice.prototype.componentDidMount = function () {
   var node = findDOMNode(this)
   linker.setupListener(node)
-  if (document.getElementsByClassName('notice-box')[0].clientHeight < 310) { this.setState({disclaimerDisabled: false}) }
-
+  if (document.getElementsByClassName('notice-box')[0].clientHeight < 310) {
+    this.setState({disclaimerDisabled: false})
+  }
 }
 
 Notice.prototype.componentWillUnmount = function () {
diff --git a/ui/app/components/transaction-list-item-icon.js b/ui/app/components/transaction-list-item-icon.js
index ca2781451..d63cae259 100644
--- a/ui/app/components/transaction-list-item-icon.js
+++ b/ui/app/components/transaction-list-item-icon.js
@@ -15,7 +15,7 @@ TransactionIcon.prototype.render = function () {
   const { transaction, txParams, isMsg } = this.props
   switch (transaction.status) {
     case 'unapproved':
-      return h( !isMsg ? '.unapproved-tx-icon' : 'i.fa.fa-certificate.fa-lg')
+      return h(!isMsg ? '.unapproved-tx-icon' : 'i.fa.fa-certificate.fa-lg')
 
     case 'rejected':
       return h('i.fa.fa-exclamation-triangle.fa-lg.warning', {
diff --git a/ui/app/components/transaction-list-item.js b/ui/app/components/transaction-list-item.js
index 6f4dfae2d..7fb2e88d9 100644
--- a/ui/app/components/transaction-list-item.js
+++ b/ui/app/components/transaction-list-item.js
@@ -134,7 +134,6 @@ function failIfFailed (transaction) {
     return h('span.error', ' (Rejected)')
   }
   if (transaction.err) {
-
     return h(Tooltip, {
       title: transaction.err.message,
       position: 'bottom',
@@ -142,5 +141,4 @@ function failIfFailed (transaction) {
       h('span.error', ' (Failed)'),
     ])
   }
-
 }
diff --git a/ui/app/conf-tx.js b/ui/app/conf-tx.js
index 770f79b19..83ac5a4fd 100644
--- a/ui/app/conf-tx.js
+++ b/ui/app/conf-tx.js
@@ -125,14 +125,12 @@ function currentTxView (opts) {
   if (txParams) {
     log.debug('txParams detected, rendering pending tx')
     return h(PendingTx, opts)
-
   } else if (msgParams) {
     log.debug('msgParams detected, rendering pending msg')
 
     if (type === 'eth_sign') {
       log.debug('rendering eth_sign message')
       return h(PendingMsg, opts)
-
     } else if (type === 'personal_sign') {
       log.debug('rendering personal_sign message')
       return h(PendingPersonalMsg, opts)
diff --git a/ui/app/reducers/app.js b/ui/app/reducers/app.js
index 324a4df35..deacad0a7 100644
--- a/ui/app/reducers/app.js
+++ b/ui/app/reducers/app.js
@@ -315,7 +315,7 @@ function reduceApp (state, action) {
     case actions.COMPLETED_TX:
       log.debug('reducing COMPLETED_TX for tx ' + action.value)
       const otherUnconfActions = getUnconfActionList(state)
-      .filter(tx => tx.id !== action.value )
+      .filter(tx => tx.id !== action.value)
       const hasOtherUnconfActions = otherUnconfActions.length > 0
 
       if (hasOtherUnconfActions) {