diff --git a/lib/$.coffee b/lib/$.coffee
index 0b4d23ca3..4b3b321a1 100644
--- a/lib/$.coffee
+++ b/lib/$.coffee
@@ -202,8 +202,8 @@ $.extend $,
     "#{size} #{['B', 'KB', 'MB', 'GB'][unit]}"
 
 <% if (type === 'crx') { %>
-  delete: (key) ->
-    localStorage.removeItem g.NAMESPACE + key
+  delete: (keys) ->
+    chrome.storage.sync.remove keys
   get: (key, defaultVal) ->
     if val = localStorage.getItem g.NAMESPACE + key
       JSON.parse val
@@ -221,10 +221,14 @@ do ->
   # To access the storage object later, keep a reference
   # to the object.
   {scriptStorage} = opera
-  $.delete = (key) ->
-    key = g.NAMESPACE + key
-    localStorage.removeItem key
-    delete scriptStorage[key]
+  $.delete = (keys) ->
+    unless keys instanceof Array
+      keys = [keys]
+    for key in keys
+      key = g.NAMESPACE + key
+      localStorage.removeItem key
+      delete scriptStorage[key]
+    return
   $.get = (key, defaultVal) ->
     if val = scriptStorage[g.NAMESPACE + key]
       JSON.parse val
@@ -238,9 +242,13 @@ do ->
     scriptStorage[key] = val
 <% } else { %>
   delete: (key) ->
-    key = g.NAMESPACE + key
-    localStorage.removeItem key
-    GM_deleteValue key
+    unless keys instanceof Array
+      keys = [keys]
+    for key in keys
+      key = g.NAMESPACE + key
+      localStorage.removeItem key
+      GM_deleteValue key
+    return
   get: (key, defaultVal) ->
     if val = GM_getValue g.NAMESPACE + key
       JSON.parse val
diff --git a/src/features.coffee b/src/features.coffee
index c5b29702f..6df6b8de4 100644
--- a/src/features.coffee
+++ b/src/features.coffee
@@ -331,8 +331,7 @@ Settings =
       innerHTML: "<button>Hidden: #{hiddenNum}</button><span class=description>: Clear manually hidden threads and posts on /#{g.BOARD}/."
     $.on $('button', div), 'click', ->
       @textContent = 'Hidden: 0'
-      $.delete "hiddenThreads.#{g.BOARD}"
-      $.delete "hiddenPosts.#{g.BOARD}"
+      $.delete ["hiddenThreads.#{g.BOARD}", "hiddenPosts.#{g.BOARD}"]
     $.after $('input[name="Stubs"]', section).parentNode.parentNode, div
   export: ->
     now  = Date.now()
diff --git a/src/manifest.json b/src/manifest.json
index 599de79a8..b17375947 100644
--- a/src/manifest.json
+++ b/src/manifest.json
@@ -14,5 +14,8 @@
     "run_at": "document_start"
   }],
   "homepage_url": "<%= meta.page %>",
-  "minimum_chrome_version": "25"
+  "minimum_chrome_version": "25",
+  "permissions": [
+    "storage"
+  ]
 }