diff --git a/ext/bg/import.html b/ext/bg/import.html
index 47483c25..85841eee 100644
--- a/ext/bg/import.html
+++ b/ext/bg/import.html
@@ -15,7 +15,7 @@
             <p>Importing dictionary data, this can take a while...</p>
 
             <div class="progress">
-                <div class="progress-bar" style="width: 0%" />
+                <div class="progress-bar progress-bar-striped" style="width: 0%">0%</div>
             </div>
         </div>
 
diff --git a/ext/bg/js/import.js b/ext/bg/js/import.js
index 905b4580..ebc7c7be 100644
--- a/ext/bg/js/import.js
+++ b/ext/bg/js/import.js
@@ -17,7 +17,16 @@
  */
 
 
-chrome.runtime.onMessage.addListener(({state, progress}, sender, callback) => {
-    $('.progress-bar').css('width', progress + '%');
+function api_setProgress({state, progress}) {
+    const str = `${progress}%`;
+    $('.progress-bar').css('width', str).text(str);
+}
+
+chrome.runtime.onMessage.addListener(({action, params}, sender, callback) => {
+    const method = this['api_' + action];
+    if (typeof(method) === 'function') {
+        method.call(this, params);
+    }
+
     callback();
 });
diff --git a/ext/bg/js/options.js b/ext/bg/js/options.js
index 290b5b05..83eb1f0a 100644
--- a/ext/bg/js/options.js
+++ b/ext/bg/js/options.js
@@ -47,9 +47,15 @@ function sanitizeOptions(options) {
 }
 
 function loadOptions() {
-    return new Promise((resolve, reject) => chrome.storage.sync.get(null, resolve));
+    return new Promise((resolve, reject) => {
+        chrome.storage.sync.get(null, opts => {
+            resolve(sanitizeOptions(opts));
+        });
+    });
 }
 
 function saveOptions(opts) {
-    return new Promise((resolve, reject) => chrome.storage.sync.set(sanitizeOptions(opts), resolve));
+    return new Promise((resolve, reject) => {
+        chrome.storage.sync.set(sanitizeOptions(opts), resolve);
+    });
 }
diff --git a/ext/bg/js/yomichan.js b/ext/bg/js/yomichan.js
index bec34691..24ddf92d 100644
--- a/ext/bg/js/yomichan.js
+++ b/ext/bg/js/yomichan.js
@@ -54,7 +54,7 @@ class Yomichan {
         }
 
         if (this.importTabId !== null) {
-            chrome.tabs.sendMessage(this.importTabId, {state, progress}, () => null);
+            this.tabInvoke(this.importTabId, 'setProgress', {state, progress});
         }
 
         if (state === 'end') {