diff --git a/extension/common.js b/extension/common.js
index 4bae2b9..72dfce2 100644
--- a/extension/common.js
+++ b/extension/common.js
@@ -416,28 +416,26 @@ chrome.contextMenus.onClicked.addListener(info => chrome.storage.local.set({
 
 /* FAQs & Feedback */
 {
-  const {onInstalled, setUninstallURL, getManifest} = chrome.runtime;
-  const {name, version} = getManifest();
-  const page = getManifest().homepage_url;
+  const {management, runtime: {onInstalled, setUninstallURL, getManifest}, storage, tabs} = chrome;
   if (navigator.webdriver !== true) {
+    const page = getManifest().homepage_url;
+    const {name, version} = getManifest();
     onInstalled.addListener(({reason, previousVersion}) => {
-      chrome.storage.local.get({
+      management.getSelf(({installType}) => installType === 'normal' && storage.local.get({
         'faqs': true,
         'last-update': 0
       }, prefs => {
         if (reason === 'install' || (prefs.faqs && reason === 'update')) {
           const doUpdate = (Date.now() - prefs['last-update']) / 1000 / 60 / 60 / 24 > 45;
           if (doUpdate && previousVersion !== version) {
-            chrome.tabs.create({
-              url: page + '?version=' + version +
-                (previousVersion ? '&p=' + previousVersion : '') +
-                '&type=' + reason,
+            tabs.create({
+              url: page + '?version=' + version + (previousVersion ? '&p=' + previousVersion : '') + '&type=' + reason,
               active: reason === 'install'
             });
-            chrome.storage.local.set({'last-update': Date.now()});
+            storage.local.set({'last-update': Date.now()});
           }
         }
-      });
+      }));
     });
     setUninstallURL(page + '?rd=feedback&name=' + encodeURIComponent(name) + '&version=' + version);
   }
diff --git a/extension/data/popup/index.css b/extension/data/popup/index.css
index fb59866..8549949 100644
--- a/extension/data/popup/index.css
+++ b/extension/data/popup/index.css
@@ -93,8 +93,7 @@ select {
 }
 #list {
   overflow: auto;
-  height: 268px;
-  margin-bottom: 16px;
+  height: 240px;
   color: #000;
   background-position: top 120px center;
   background-repeat: no-repeat;
@@ -177,7 +176,7 @@ select {
 #agent {
   white-space: nowrap;
   display: grid;
-  grid-template-columns: repeat(7, 1fr);
+  grid-template-columns: repeat(4, 1fr);
   grid-gap: 1px;
 }
 
diff --git a/extension/data/popup/index.html b/extension/data/popup/index.html
index 8bed3c0..0cfe9ab 100644
--- a/extension/data/popup/index.html
+++ b/extension/data/popup/index.html
@@ -121,12 +121,13 @@
       </table>
     </div>
     <div id="explore" data-cols=4></div>
-    <div hbox id="agent" align="center">
+    <div id="agent" align="center">
       <input type="button" value="Options" title="Open options page" style="margin-left: 2px;" data-cmd="options">
       <input type="button" value="Restart" title="Click to reload the extension. This will cause all the window-based user-agent strings to be cleared" data-cmd="reload">
       <input type="button" value="Refresh Tab" title="Refresh the current page" data-cmd="refresh">
       <input type="button" value="Reset" title="Reset User-Agent string to the default one. This will not reset window-based UA strings. To reset them, use the 'Restart' button" data-cmd="reset">
       <input type="button" value="Test" title="Test your user-agent string" data-cmd="test">
+      <span></span>
       <input type="button" value="Window" title="Set this string as this window's User-Agent string" data-cmd="window">
       <input type="button" value="Apply" title="Set this string as the browser's User-Agent string" data-cmd="apply">
     </div>
diff --git a/extension/data/popup/index.js b/extension/data/popup/index.js
index 59d6889..bbdc7a7 100644
--- a/extension/data/popup/index.js
+++ b/extension/data/popup/index.js
@@ -43,45 +43,46 @@ function update(ua) {
   tbody.textContent = '';
 
   parent.dataset.loading = true;
-  fetch('browsers/' + browser.toLowerCase() + '-' + os.toLowerCase().replace(/\//g, '-') + '.json').then(r => r.json()).catch(e => {
-    console.error(e);
-    return [];
-  }).then(list => {
-    if (list) {
-      const fragment = document.createDocumentFragment();
-      let radio;
-      for (const o of sort(list)) {
-        const clone = document.importNode(t.content, true);
-        const second = clone.querySelector('td:nth-child(2)');
-        second.title = second.textContent = o.browser.name + ' ' + (o.browser.version || ' ');
-        const third = clone.querySelector('td:nth-child(3)');
-        third.title = third.textContent = o.os.name + ' ' + (o.os.version || ' ');
-        const forth = clone.querySelector('td:nth-child(4)');
-        forth.title = forth.textContent = o.ua;
-        if (o.ua === ua) {
-          radio = clone.querySelector('input[type=radio]');
+  fetch('browsers/' + browser.toLowerCase() + '-' + os.toLowerCase().replace(/\//g, '-') + '.json')
+    .then(r => r.json()).catch(e => {
+      console.error(e);
+      return [];
+    }).then(list => {
+      if (list) {
+        const fragment = document.createDocumentFragment();
+        let radio;
+        for (const o of sort(list)) {
+          const clone = document.importNode(t.content, true);
+          const second = clone.querySelector('td:nth-child(2)');
+          second.title = second.textContent = o.browser.name + ' ' + (o.browser.version || ' ');
+          const third = clone.querySelector('td:nth-child(3)');
+          third.title = third.textContent = o.os.name + ' ' + (o.os.version || ' ');
+          const forth = clone.querySelector('td:nth-child(4)');
+          forth.title = forth.textContent = o.ua;
+          if (o.ua === ua) {
+            radio = clone.querySelector('input[type=radio]');
+          }
+          fragment.appendChild(clone);
         }
-        fragment.appendChild(clone);
-      }
-      tbody.appendChild(fragment);
-      if (radio) {
-        radio.checked = true;
-        radio.scrollIntoView({
-          block: 'center',
-          inline: 'nearest'
+        tbody.appendChild(fragment);
+        if (radio) {
+          radio.checked = true;
+          radio.scrollIntoView({
+            block: 'center',
+            inline: 'nearest'
+          });
+        }
+        document.getElementById('custom').placeholder = `Filter among ${list.length}`;
+        [...document.getElementById('os').querySelectorAll('option')].forEach(option => {
+          option.disabled = (map.matching[browser.toLowerCase()] || []).indexOf(option.value.toLowerCase()) === -1;
         });
       }
-      document.getElementById('custom').placeholder = `Filter among ${list.length}`;
-      [...document.getElementById('os').querySelectorAll('option')].forEach(option => {
-        option.disabled = (map.matching[browser.toLowerCase()] || []).indexOf(option.value.toLowerCase()) === -1;
-      });
-    }
-    else {
-      throw Error('OS is not found');
-    }
-  }).finally(() => {
-    parent.dataset.loading = false;
-  });
+      else {
+        throw Error('OS is not found');
+      }
+    }).finally(() => {
+      parent.dataset.loading = false;
+    });
 }
 
 document.getElementById('browser').addEventListener('change', e => chrome.storage.local.set({