2 files changed, 15 insertions, 5 deletions
diff --git a/app/scripts/background.js b/app/scripts/background.js
index 280c28d70..88600bf1e 100644
--- a/app/scripts/background.js
+++ b/app/scripts/background.js
@@ -57,7 +57,13 @@ async function loadStateFromPersistence () {
   // fetch from extension store and merge in data
 
   if (localStore.isSupported) {
-    const localData = await localStore.get()
+    let localData
+    try {
+      localData = await localStore.get()
+    } catch (err) {
+      log.error('error fetching state from local store:', err)
+    }
+
    // TODO: handle possible exceptions (https://developer.chrome.com/apps/runtime#property-lastError)
     versionedData = Object.keys(localData).length > 0 ? localData : versionedData
   }
@@ -113,7 +119,11 @@ function setupController (initState) {
 
   function syncDataWithExtension(state) {
     if (localStore.isSupported) {
-      localStore.set(state) // TODO: handle possible exceptions (https://developer.chrome.com/apps/runtime#property-lastError)
+      try {
+        localStore.set(state)
+      } catch (err) {
+        log.error('error setting state in local store:', err)
+      }
     }
     return state
   }
diff --git a/app/scripts/lib/extension-store.js b/app/scripts/lib/extension-store.js
index 67ee71f16..4a970321c 100644
--- a/app/scripts/lib/extension-store.js
+++ b/app/scripts/lib/extension-store.js
@@ -15,12 +15,12 @@ const handleDisabledSyncAndResolve = (resolve, toResolve) => {
 
 module.exports = class ExtensionStore {
   constructor() {
-    this.isSupported = !!(extension.storage.sync)
+    this.isSupported = !!(extension.storage && extension.storage.sync)
     this.isEnabled = true // TODO: get value from user settings
   }
   async fetch() {
     return new Promise((resolve) => {
-      extension.storage.sync.get(KEYS_TO_SYNC, (data) => {
+      extension.storage && extension.storage.sync.get(KEYS_TO_SYNC, (data) => {
         handleDisabledSyncAndResolve(resolve, data)
       })
     })
@@ -31,7 +31,7 @@ module.exports = class ExtensionStore {
       return result
     }, {})
     return new Promise((resolve) => {
-      extension.storage.sync.set(dataToSync, () => {
+      extension.storage && extension.storage.sync.set(dataToSync, () => {
         handleDisabledSyncAndResolve(resolve)
       })
     })