diff --git a/src/background.js b/src/background.js
index ed86f66..b7857c8 100644
--- a/src/background.js
+++ b/src/background.js
@@ -1,266 +1,266 @@
 var array_elements = [], translator_tab = null, translator_window = null;
 
 function isEmpty(obj) {
-	return Object.keys(obj).length === 0;
+  return Object.keys(obj).length === 0;
 }
 
 function getTranslationUrl(lang, text) {
-	var params = new URLSearchParams({
-		sl: 'auto',
-		tl: lang,
-		text: text,
-		op: 'translate',
-	});
-	return 'https://translate.google.com/?' + params.toString();
+  var params = new URLSearchParams({
+    sl: 'auto',
+    tl: lang,
+    text: text,
+    op: 'translate',
+  });
+  return 'https://translate.google.com/?' + params.toString();
 }
 
 function translationClick(info, tab) {
-	console.log(info.selectionText);
-	chrome.storage.sync.get('uniquetab', items => {
-		var url = getTranslationUrl(
-		    array_elements[info.menuItemId]['langCode'], info.selectionText);
-		var settings_tab = {url};
-		if (translator_tab && items.uniquetab == 'yep') {
-			chrome.tabs.update(translator_tab, settings_tab, tab => {
-				chrome.tabs.highlight(
-				    {
-					    windowId: tab.windowId,
-					    tabs: tab.index,
-				    },
-				    _ => {
-					    chrome.windows.update(tab.windowId, {
-						    focused: true,
-					    });
-				    });
-			});
-		} else if (items.uniquetab == 'panel') {
-			chrome.windows.create(
-			    {
-				    type: 'panel',
-				    url,
-				    width: 1000,
-				    height: 382,
-			    },
-			    function(tab) {
-				    translator_window = tab.windowId;
-				    translator_tab = tab.id;
-				    chrome.windows.onRemoved.addListener(function(windowId) {
-					    if (windowId == translator_window) {
-						    translator_window = null;
-						    translator_tab = null;
-					    }
-				    });
-			    });
-		} else {
-			chrome.tabs.create(settings_tab, function(tab) {
-				translator_window = tab.windowId;
-				translator_tab = tab.id;
-				chrome.tabs.onRemoved.addListener(function(tabId, removeInfo) {
-					if (tabId == translator_tab) {
-						translator_window = null;
-						translator_tab = null;
-					}
-				});
-			});
-		}
-	});
+  console.log(info.selectionText);
+  chrome.storage.sync.get('uniquetab', items => {
+    var url = getTranslationUrl(
+        array_elements[info.menuItemId]['langCode'], info.selectionText);
+    var settings_tab = {url};
+    if (translator_tab && items.uniquetab == 'yep') {
+      chrome.tabs.update(translator_tab, settings_tab, tab => {
+        chrome.tabs.highlight(
+            {
+              windowId: tab.windowId,
+              tabs: tab.index,
+            },
+            _ => {
+              chrome.windows.update(tab.windowId, {
+                focused: true,
+              });
+            });
+      });
+    } else if (items.uniquetab == 'panel') {
+      chrome.windows.create(
+          {
+            type: 'panel',
+            url,
+            width: 1000,
+            height: 382,
+          },
+          function(tab) {
+            translator_window = tab.windowId;
+            translator_tab = tab.id;
+            chrome.windows.onRemoved.addListener(function(windowId) {
+              if (windowId == translator_window) {
+                translator_window = null;
+                translator_tab = null;
+              }
+            });
+          });
+    } else {
+      chrome.tabs.create(settings_tab, function(tab) {
+        translator_window = tab.windowId;
+        translator_tab = tab.id;
+        chrome.tabs.onRemoved.addListener(function(tabId, removeInfo) {
+          if (tabId == translator_tab) {
+            translator_window = null;
+            translator_tab = null;
+          }
+        });
+      });
+    }
+  });
 }
 
 function openOptionsPage() {
-	if (chrome.runtime.openOptionsPage) {
-		// New way to open options pages, if supported (Chrome 42+).
-		chrome.runtime.openOptionsPage();
-	} else {
-		chrome.tabs.create(
-		    {
-			    'url': 'chrome-extension://' +
-			        chrome.i18n.getMessage('@@extension_id') + '/options.html',
-			    'active': true
-		    },
-		    tab => {
-			    chrome.windows.update(tab.windowId, {focused: true});
-		    });
-	}
+  if (chrome.runtime.openOptionsPage) {
+    // New way to open options pages, if supported (Chrome 42+).
+    chrome.runtime.openOptionsPage();
+  } else {
+    chrome.tabs.create(
+        {
+          'url': 'chrome-extension://' +
+              chrome.i18n.getMessage('@@extension_id') + '/options.html',
+          'active': true
+        },
+        tab => {
+          chrome.windows.update(tab.windowId, {focused: true});
+        });
+  }
 }
 
 function createmenus() {
-	chrome.storage.sync.get('translateinto', function(items) {
-		chrome.contextMenus.removeAll();
+  chrome.storage.sync.get('translateinto', function(items) {
+    chrome.contextMenus.removeAll();
 
-		var count = 0, singleone = true;
+    var count = 0, singleone = true;
 
-		for (var language of Object.keys(items.translateinto)) {
-			if (count == 0) {
-				count++;
-			} else {
-				singleone = false;
-				break;
-			}
-		}
+    for (var language of Object.keys(items.translateinto)) {
+      if (count == 0) {
+        count++;
+      } else {
+        singleone = false;
+        break;
+      }
+    }
 
-		if (singleone) {
-			for (var language_id of Object.keys(items.translateinto)) {
-				var language = items.translateinto[language_id];
-				var languagem = isoLangs[language];
-				var id = chrome.contextMenus.create({
-					'id': 'tr_single_parent',
-					'title': chrome.i18n.getMessage('contextmenu_title2', languagem.name),
-					'contexts': ['selection'],
-				});
-				array_elements[id] = new Array();
-				array_elements[id]['langCode'] = language;
-			}
-		} else {
-			var parentEl = chrome.contextMenus.create({
-				'id': 'parent',
-				'title': chrome.i18n.getMessage('contextmenu_title'),
-				'contexts': ['selection']
-			});
-			for (var language_id of Object.keys(items.translateinto)) {
-				var language = items.translateinto[language_id];
-				var languagem = isoLangs[language];
-				var title = languagem.name + ' (' + languagem.nativeName + ')';
-				var id = chrome.contextMenus.create({
-					'id': 'tr_language_' + language,
-					'title': title,
-					'parentId': parentEl,
-					'contexts': ['selection']
-				});
-				array_elements[id] = new Array();
-				array_elements[id]['langCode'] = language;
-			}
-			chrome.contextMenus.create({
-				'id': 'tr_separator',
-				'type': 'separator',
-				'parentId': parentEl,
-				'contexts': ['selection']
-			});
-			chrome.contextMenus.create({
-				'id': 'tr_options',
-				'title': chrome.i18n.getMessage('contextmenu_edit'),
-				'parentId': parentEl,
-				'contexts': ['selection']
-			});
-		}
-	});
+    if (singleone) {
+      for (var language_id of Object.keys(items.translateinto)) {
+        var language = items.translateinto[language_id];
+        var languagem = isoLangs[language];
+        var id = chrome.contextMenus.create({
+          'id': 'tr_single_parent',
+          'title': chrome.i18n.getMessage('contextmenu_title2', languagem.name),
+          'contexts': ['selection'],
+        });
+        array_elements[id] = new Array();
+        array_elements[id]['langCode'] = language;
+      }
+    } else {
+      var parentEl = chrome.contextMenus.create({
+        'id': 'parent',
+        'title': chrome.i18n.getMessage('contextmenu_title'),
+        'contexts': ['selection']
+      });
+      for (var language_id of Object.keys(items.translateinto)) {
+        var language = items.translateinto[language_id];
+        var languagem = isoLangs[language];
+        var title = languagem.name + ' (' + languagem.nativeName + ')';
+        var id = chrome.contextMenus.create({
+          'id': 'tr_language_' + language,
+          'title': title,
+          'parentId': parentEl,
+          'contexts': ['selection']
+        });
+        array_elements[id] = new Array();
+        array_elements[id]['langCode'] = language;
+      }
+      chrome.contextMenus.create({
+        'id': 'tr_separator',
+        'type': 'separator',
+        'parentId': parentEl,
+        'contexts': ['selection']
+      });
+      chrome.contextMenus.create({
+        'id': 'tr_options',
+        'title': chrome.i18n.getMessage('contextmenu_edit'),
+        'parentId': parentEl,
+        'contexts': ['selection']
+      });
+    }
+  });
 }
 
 chrome.runtime.onInstalled.addListener(function(details) {
-	chrome.storage.sync.get(null, function(items) {
-		if (details.reason == 'install') {
-			if (isEmpty(items)) {
-				var settings = {'translateinto': {}, 'uniquetab': ''},
-				    default_language =
-				        chrome.i18n.getMessage('@@ui_locale').split('_')[0];
+  chrome.storage.sync.get(null, function(items) {
+    if (details.reason == 'install') {
+      if (isEmpty(items)) {
+        var settings = {'translateinto': {}, 'uniquetab': ''},
+            default_language =
+                chrome.i18n.getMessage('@@ui_locale').split('_')[0];
 
-				if (isoLangs[default_language] != 'undefined') {
-					settings.translateinto[default_language] = default_language;
-				}
+        if (isoLangs[default_language] != 'undefined') {
+          settings.translateinto[default_language] = default_language;
+        }
 
-				chrome.storage.sync.set(settings, function() {
-					chrome.notifications.create('install', {
-						type: 'basic',
-						iconUrl: 'icons/translate-128.png',
-						title: chrome.i18n.getMessage('notification_install_title'),
-						message: chrome.i18n.getMessage('notification_install_message'),
-						isClickable: true
-					});
-				});
-			}
-		}
-		if (details.reason == 'update') {
-			var version = details.previousVersion.split('.');
+        chrome.storage.sync.set(settings, function() {
+          chrome.notifications.create('install', {
+            type: 'basic',
+            iconUrl: 'icons/translate-128.png',
+            title: chrome.i18n.getMessage('notification_install_title'),
+            message: chrome.i18n.getMessage('notification_install_message'),
+            isClickable: true
+          });
+        });
+      }
+    }
+    if (details.reason == 'update') {
+      var version = details.previousVersion.split('.');
 
-			// Updating from a version previous to v0.6
-			if (version[0] == '0' && version[1] < '6') {
-				var settings = {
-					languages: {},
-					uniquetab: '',
-				};
-				var default_language =
-				    chrome.i18n.getMessage('@@ui_locale').split('_')[0];
+      // Updating from a version previous to v0.6
+      if (version[0] == '0' && version[1] < '6') {
+        var settings = {
+          languages: {},
+          uniquetab: '',
+        };
+        var default_language =
+            chrome.i18n.getMessage('@@ui_locale').split('_')[0];
 
-				if (isoLangs[default_language] != 'undefined')
-					settings.languages[default_language] = default_language;
+        if (isoLangs[default_language] != 'undefined')
+          settings.languages[default_language] = default_language;
 
-				chrome.storage.sync.set(settings, function() {
-					chrome.notifications.create('upgradedtostorage', {
-						type: 'basic',
-						iconUrl: 'icons/translate-128.png',
-						title:
-						    chrome.i18n.getMessage('notification_upgradedtostorage_title'),
-						message: chrome.i18n.getMessage(
-						    'notification_upgradedtostorage_message'),
-						isClickable: true,
-					});
-				});
-			}
+        chrome.storage.sync.set(settings, function() {
+          chrome.notifications.create('upgradedtostorage', {
+            type: 'basic',
+            iconUrl: 'icons/translate-128.png',
+            title:
+                chrome.i18n.getMessage('notification_upgradedtostorage_title'),
+            message: chrome.i18n.getMessage(
+                'notification_upgradedtostorage_message'),
+            isClickable: true,
+          });
+        });
+      }
 
-			// Updating from a version previous to v0.7
-			if (version[0] == '0' && version[1] < '7') {
-				items.translateinto = {};
-				var i = 0;
-				for (var language in items.languages) {
-					items.translateinto[i] = items.languages[language];
-					i++;
-				}
-				delete items.languages;
-				chrome.storage.sync.set(items, _ => {
-					chrome.notifications.create('reorder', {
-						type: 'basic',
-						iconUrl: 'icons/translate-128.png',
-						title: chrome.i18n.getMessage('notification_reorder_title'),
-						message: chrome.i18n.getMessage('notification_reorder_message'),
-						isClickable: true
-					});
-				});
-			}
-		}
-	});
+      // Updating from a version previous to v0.7
+      if (version[0] == '0' && version[1] < '7') {
+        items.translateinto = {};
+        var i = 0;
+        for (var language in items.languages) {
+          items.translateinto[i] = items.languages[language];
+          i++;
+        }
+        delete items.languages;
+        chrome.storage.sync.set(items, _ => {
+          chrome.notifications.create('reorder', {
+            type: 'basic',
+            iconUrl: 'icons/translate-128.png',
+            title: chrome.i18n.getMessage('notification_reorder_title'),
+            message: chrome.i18n.getMessage('notification_reorder_message'),
+            isClickable: true
+          });
+        });
+      }
+    }
+  });
 });
 
 chrome.storage.onChanged.addListener((changes, areaName) => {
-	if (areaName == 'sync') createmenus();
+  if (areaName == 'sync') createmenus();
 });
 
 chrome.storage.sync.get(null, items => {
-	if (items.translateinto) {
-		createmenus();
-	} else {
-		chrome.contextMenus.removeAll();
-		var parent = chrome.contextMenus.create({
-			'id': 'tr_parent',
-			'title': chrome.i18n.getMessage('contextmenu_title'),
-			'contexts': ['selection']
-		});
-		var id = chrome.contextMenus.create({
-			'id': 'tr_options',
-			'title': chrome.i18n.getMessage('contextmenu_edit'),
-			'parentId': parent,
-			'contexts': ['selection']
-		});
-	}
+  if (items.translateinto) {
+    createmenus();
+  } else {
+    chrome.contextMenus.removeAll();
+    var parent = chrome.contextMenus.create({
+      'id': 'tr_parent',
+      'title': chrome.i18n.getMessage('contextmenu_title'),
+      'contexts': ['selection']
+    });
+    var id = chrome.contextMenus.create({
+      'id': 'tr_options',
+      'title': chrome.i18n.getMessage('contextmenu_edit'),
+      'parentId': parent,
+      'contexts': ['selection']
+    });
+  }
 });
 
 chrome.notifications.onClicked.addListener(notification_id => {
-	switch (notification_id) {
-		case 'install':
-		case 'upgradedtostorage':
-		case 'reorder':
-			openOptionsPage();
-			break;
-	}
-	chrome.notifications.clear(notification_id);
+  switch (notification_id) {
+    case 'install':
+    case 'upgradedtostorage':
+    case 'reorder':
+      openOptionsPage();
+      break;
+  }
+  chrome.notifications.clear(notification_id);
 });
 
 chrome.contextMenus.onClicked.addListener((info, tab) => {
-	if (info.menuItemId == 'tr_options') {
-		openOptionsPage();
-	} else {
-		translationClick(info, tab);
-	}
+  if (info.menuItemId == 'tr_options') {
+    openOptionsPage();
+  } else {
+    translationClick(info, tab);
+  }
 });
 
 chrome.browserAction.onClicked.addListener(_ => {
-	openOptionsPage();
+  openOptionsPage();
 });
diff --git a/src/css/options.css b/src/css/options.css
index 72b5904..7808e30 100644
--- a/src/css/options.css
+++ b/src/css/options.css
@@ -1,157 +1,172 @@
 /*@import url("widgets.css");*/
 
 body {
-	padding: 10px;
-	font-family: "Roboto", "Arial", sans-serif!important;
-	background-color: #BBDEFB;
-	background-repeat: repeat;
-	background-position: left top;
-	font-size: 90%;
-	cursor: default;
-	min-width: 400px;
+  padding: 10px;
+  font-family: "Roboto", "Arial", sans-serif !important;
+  background-color: #BBDEFB;
+  background-repeat: repeat;
+  background-position: left top;
+  font-size: 90%;
+  cursor: default;
+  min-width: 400px;
 }
+
 h1 {
-	text-align: center;
-	font-size: 30px;
+  text-align: center;
+  font-size: 30px;
 }
+
 h2 {
-	font-size: 20px;
+  font-size: 20px;
 }
+
 #languages_container {
-	width: 300px;
-	height: 365px;
-	border: 1px solid #ccc;
-	background-color: #E3F2FD;
-	overflow: auto;
+  width: 300px;
+  height: 365px;
+  border: 1px solid #ccc;
+  background-color: #E3F2FD;
+  overflow: auto;
 }
+
 #languages {
-	list-style: none;
-	margin: 0;
-	padding: 0;
+  list-style: none;
+  margin: 0;
+  padding: 0;
 }
+
 #languages li {
-	padding: 15px;
-	border-bottom: 1px dashed #ddd;
-	background-color: #EEF7FD;
-	cursor: move;
-	-webkit-user-select: none;
+  padding: 15px;
+  border-bottom: 1px dashed #ddd;
+  background-color: #EEF7FD;
+  cursor: move;
+  -webkit-user-select: none;
 }
+
 #languages li.sortable-ghost {
-	background-color: #E3F2FD;
+  background-color: #E3F2FD;
 }
+
 #languages li .delete {
-	font-size: 14px;
-	float: right;
-	cursor: pointer;
-	color: red;
+  font-size: 14px;
+  float: right;
+  cursor: pointer;
+  color: red;
 }
+
 #languages_footer {
-	width: 300px;
-	height: 35px;
-	background-color: #fff;
-	border: 1px solid #ccc;
-	border-top: 0;
+  width: 300px;
+  height: 35px;
+  background-color: #fff;
+  border: 1px solid #ccc;
+  border-top: 0;
 }
-button, input, select, option {
-	font-size: 13px!important;
+
+button,
+input,
+select,
+option {
+  font-size: 13px !important;
 }
+
 #languages_add {
-	margin-left: 4px;
-	margin-top: 4px;
+  margin-left: 4px;
+  margin-top: 4px;
 }
+
 #save {
-	display: block;
-	margin: 18px auto;
+  display: block;
+  margin: 18px auto;
 }
 
 /* Dialog */
 dialog#languages_add_dialog {
-	position: fixed;
-	top: 50%;
-	left: 50%;
-	margin-left: -216px;
-	margin-top: -91px;
-	height: 150px;
-	width: 400px;
-	border: 1px solid rgba(0, 0, 0, 0.3);
-	border-radius: 6px;
-	box-shadow: 0 3px 7px rgba(0, 0, 0, 0.3);
+  position: fixed;
+  top: 50%;
+  left: 50%;
+  margin-left: -216px;
+  margin-top: -91px;
+  height: 150px;
+  width: 400px;
+  border: 1px solid rgba(0, 0, 0, 0.3);
+  border-radius: 6px;
+  box-shadow: 0 3px 7px rgba(0, 0, 0, 0.3);
 }
 
 dialog h3 {
-	margin-bottom: 10px;
+  margin-bottom: 10px;
 }
 
 dialog #language_label {
-	font-size: 12px;
+  font-size: 12px;
 }
 
 dialog select {
-	width: 100%;
+  width: 100%;
 }
 
 dialog .action_buttons {
-	margin-top: 10px;
-	float: right;
+  margin-top: 10px;
+  float: right;
 }
 
 dialog::backdrop {
-	position: fixed;
-	top: 0;
-	left: 0;
-	right: 0;
-	bottom: 0;
-	background-color: rgba(0, 0, 0, 0.5);
+  position: fixed;
+  top: 0;
+  left: 0;
+  right: 0;
+  bottom: 0;
+  background-color: rgba(0, 0, 0, 0.5);
 }
 
 /* Credits */
 #credits_container {
-	position: absolute;
-	top: 0px;
-	right: 50px;
-	background: rgb(195, 235, 204);
-	border: solid 1px rgb(139, 139, 139);
-	border-top: 0;
-	border-radius: 0px 0px 5px 5px;
+  position: absolute;
+  top: 0px;
+  right: 50px;
+  background: rgb(195, 235, 204);
+  border: solid 1px rgb(139, 139, 139);
+  border-top: 0;
+  border-radius: 0px 0px 5px 5px;
 }
 
 #credits_container a {
-	color: green!important;
-	margin: 0 5px;
+  color: green !important;
+  margin: 0 5px;
 }
 
 dialog#credits_dialog {
-	position: fixed;
-	top: 50%;
-	left: 50%;
-	margin-left: -216px;
-	margin-top: -231px;
-	height: 430px;
-	width: 400px;
-	border: 1px solid rgba(0, 0, 0, 0.3);
-	border-radius: 6px;
-	box-shadow: 0 3px 7px rgba(0, 0, 0, 0.3);
+  position: fixed;
+  top: 50%;
+  left: 50%;
+  margin-left: -216px;
+  margin-top: -231px;
+  height: 430px;
+  width: 400px;
+  border: 1px solid rgba(0, 0, 0, 0.3);
+  border-radius: 6px;
+  box-shadow: 0 3px 7px rgba(0, 0, 0, 0.3);
 }
 
 dialog#credits_dialog .content_area h4 {
-	margin-bottom: 0px;
+  margin-bottom: 0px;
 }
 
 dialog#credits_dialog .content_area a.homepage {
-	position: absolute;
-	right: 16px;
-	font-size: 14px;
+  position: absolute;
+  right: 16px;
+  font-size: 14px;
 }
 
-dialog#credits_dialog .content_area p, dialog#credits_dialog .content_area span {
-	font-size: 14px;
+dialog#credits_dialog .content_area p,
+dialog#credits_dialog .content_area span {
+  font-size: 14px;
 }
 
 dialog#credits_dialog .content_area p.author {
-	margin-top: 7px;
+  margin-top: 7px;
 }
 
 #otheroptions p {
-	margin-top: 0;
-	margin-bottom: 0;
+  margin-top: 0;
+  margin-bottom: 0;
 }
diff --git a/src/js/options.js b/src/js/options.js
index eba0a1a..0f79b2d 100644
--- a/src/js/options.js
+++ b/src/js/options.js
@@ -1,229 +1,226 @@
 function $(selector) {
-    return document.querySelector(selector);
+  return document.querySelector(selector);
 }
 
 function $all(selector) {
-    return document.querySelectorAll(selector);
+  return document.querySelectorAll(selector);
 }
 
 function isEmpty(obj) {
-    return Object.keys(obj).length === 0;
+  return Object.keys(obj).length === 0;
 }
 
 function i18n() {
-    $all('[data-i18n]').forEach(el => {
-        el.innerHTML =
-            chrome.i18n.getMessage('options_' + el.getAttribute('data-i18n'));
-    });
+  $all('[data-i18n]').forEach(el => {
+    el.innerHTML =
+        chrome.i18n.getMessage('options_' + el.getAttribute('data-i18n'));
+  });
 }
 
 function printListModal() {
-    $('#select_language').textContent = '';
-    var heysortable = sortable.toArray();
-    for (var language in isoLangs) {
-        if (!inArray(language, heysortable)) {
-            var el = document.createElement('option');
-            el.setAttribute('value', language);
-            el.innerText = isoLangs[language]['name'] + ' (' +
-                isoLangs[language]['nativeName'] + ')';
-            $('#select_language').appendChild(el);
-        }
+  $('#select_language').textContent = '';
+  var heysortable = sortable.toArray();
+  for (var language in isoLangs) {
+    if (!inArray(language, heysortable)) {
+      var el = document.createElement('option');
+      el.setAttribute('value', language);
+      el.innerText = isoLangs[language]['name'] + ' (' +
+          isoLangs[language]['nativeName'] + ')';
+      $('#select_language').appendChild(el);
     }
+  }
 }
 
 function init() {
-    i18n();
-    chrome.storage.sync.get(null, items => {
-        // If no settings are set
-        if (isEmpty(items)) {
-            items = {
-                translateinto: {},
-                uniquetab: '',
-            };
-            chrome.storage.sync.set(items);
-        }
+  i18n();
+  chrome.storage.sync.get(null, items => {
+    // If no settings are set
+    if (isEmpty(items)) {
+      items = {
+        translateinto: {},
+        uniquetab: '',
+      };
+      chrome.storage.sync.set(items);
+    }
 
-        // Check the checkbox of the window opening
-        if (items.uniquetab === 'yep') $('#uniquetab').checked = true;
-        if (items.uniquetab === '') $('#varioustabs').checked = true;
-        if (items.uniquetab === 'panel') $('#panel').checked = true;
+    // Check the checkbox of the window opening
+    if (items.uniquetab === 'yep') $('#uniquetab').checked = true;
+    if (items.uniquetab === '') $('#varioustabs').checked = true;
+    if (items.uniquetab === 'panel') $('#panel').checked = true;
 
-        // Add event listeners for certain buttons and links
-        $('#panelsflag').addEventListener('click', _ => {
-            event.preventDefault();
-            chrome.tabs.create({url: 'chrome://flags/#enable-panels'});
-        });
-
-        $('#save').addEventListener('click', _ => {
-            saveOptions();
-        });
-
-        // Print selected language list
-        var languages = items.translateinto;
-
-        if (languages) {
-            for (var language_id of Object.keys(languages)) {
-                var language = languages[language_id];
-                var el = document.createElement('li');
-                el.setAttribute('data-language', language);
-                el.setAttribute('data-id', language);
-                el.innerHTML = isoLangs[language]['name'] + ' (' +
-                    isoLangs[language]['nativeName'] + ')' +
-                    '<span data-language=\'' + language +
-                    '\' class=\'delete\'>x</span>';
-                $('#languages').appendChild(el);
-                $('#languages li[data-language=' + language + '] .delete')
-                    .addEventListener('click', function() {
-                        $('#languages')
-                            .removeChild(
-                                $('li[data-language=' +
-                                  this.getAttribute('data-language') + ']'));
-                        printListModal();
-                    });
-            }
-        }
-
-        // Initiate Sortable
-        sortable = new Sortable($('#languages'), {animation: 150});
-
-        // Handling The Dialog
-        $('#languages_add').addEventListener('click', _ => {
-            $('dialog#languages_add_dialog').showModal();
-            $('#select_language').focus();
-        });
-
-        $('#languages_add_cancel').addEventListener('click', _ => {
-            $('dialog#languages_add_dialog').close();
-        });
-
-        $('#languages_add_ok').addEventListener('click', _ => {
-            var el = document.createElement('li');
-            var language = $('#select_language').value;
-            if (inArray(language, sortable.toArray())) {
-                return;
-            }
-            el.setAttribute('data-language', language);
-            el.setAttribute('data-id', language);
-            el.innerHTML = isoLangs[language]['name'] + ' (' +
-                isoLangs[language]['nativeName'] + ')' +
-                '<span data-language=\'' + language +
-                '\' class=\'delete\'>x</span>';
-            $('#languages').appendChild(el);
-            var selection =
-                $('#select_language option[value=' + language + ']');
-            selection.parentNode.removeChild(selection);
-            $('#languages li[data-id=' + language + '] .delete')
-                .addEventListener('click', function() {
-                    $('#languages')
-                        .removeChild(
-                            $('li[data-language=' +
-                              this.getAttribute('data-language') + ']'));
-                    printListModal();
-                });
-            $('dialog').close();
-        });
-
-        // About credits...
-        fetch('json/credits.json')
-            .then(res => res.json())
-            .then(json => {
-                var content = $('dialog#credits_dialog .content_area');
-                json.forEach(item => {
-                    var div = document.createElement('div');
-                    if (item.url) {
-                        var a = document.createElement('a');
-                        a.classList.add('homepage');
-                        a.href = item.url;
-                        a.target = '_blank';
-                        a.textContent =
-                            chrome.i18n.getMessage('options_credits_homepage');
-                        div.append(a);
-                    }
-
-                    var h4 = document.createElement('h4');
-                    h4.textContent = item.name;
-                    div.append(h4);
-
-                    if (item.author) {
-                        var p = document.createElement('p');
-                        p.classList.add('author');
-                        p.textContent =
-                            chrome.i18n.getMessage('options_credits_by') + ' ' +
-                            item.author +
-                            (item.license ? ' - ' + item.license : '');
-                        div.append(p);
-                    }
-                    content.append(div);
-                });
-
-                window.onhashchange = function() {
-                    if (location.hash == '#credits') {
-                        $('dialog#credits_dialog').showModal();
-                        $('#credits_ok').focus();
-                    }
-                };
-
-                if (location.hash == '#credits') {
-                    $('dialog#credits_dialog').showModal();
-                    $('#credits_ok').focus();
-                }
-
-                $('#credits_ok').addEventListener('click', _ => {
-                    $('dialog#credits_dialog').close();
-                });
-                $('dialog#credits_dialog').addEventListener('close', _ => {
-                    history.pushState(
-                        '', document.title,
-                        window.location.pathname + window.location.search);
-                });
-
-                // Print language list in the modal dialog
-                printListModal();
-            })
-            .catch(err => console.log(err));
+    // Add event listeners for certain buttons and links
+    $('#panelsflag').addEventListener('click', _ => {
+      event.preventDefault();
+      chrome.tabs.create({url: 'chrome://flags/#enable-panels'});
     });
+
+    $('#save').addEventListener('click', _ => {
+      saveOptions();
+    });
+
+    // Print selected language list
+    var languages = items.translateinto;
+
+    if (languages) {
+      for (var language_id of Object.keys(languages)) {
+        var language = languages[language_id];
+        var el = document.createElement('li');
+        el.setAttribute('data-language', language);
+        el.setAttribute('data-id', language);
+        el.innerHTML = isoLangs[language]['name'] + ' (' +
+            isoLangs[language]['nativeName'] + ')' +
+            '<span data-language=\'' + language +
+            '\' class=\'delete\'>x</span>';
+        $('#languages').appendChild(el);
+        $('#languages li[data-language=' + language + '] .delete')
+            .addEventListener('click', function() {
+              $('#languages')
+                  .removeChild($(
+                      'li[data-language=' + this.getAttribute('data-language') +
+                      ']'));
+              printListModal();
+            });
+      }
+    }
+
+    // Initiate Sortable
+    sortable = new Sortable($('#languages'), {animation: 150});
+
+    // Handling The Dialog
+    $('#languages_add').addEventListener('click', _ => {
+      $('dialog#languages_add_dialog').showModal();
+      $('#select_language').focus();
+    });
+
+    $('#languages_add_cancel').addEventListener('click', _ => {
+      $('dialog#languages_add_dialog').close();
+    });
+
+    $('#languages_add_ok').addEventListener('click', _ => {
+      var el = document.createElement('li');
+      var language = $('#select_language').value;
+      if (inArray(language, sortable.toArray())) {
+        return;
+      }
+      el.setAttribute('data-language', language);
+      el.setAttribute('data-id', language);
+      el.innerHTML = isoLangs[language]['name'] + ' (' +
+          isoLangs[language]['nativeName'] + ')' +
+          '<span data-language=\'' + language + '\' class=\'delete\'>x</span>';
+      $('#languages').appendChild(el);
+      var selection = $('#select_language option[value=' + language + ']');
+      selection.parentNode.removeChild(selection);
+      $('#languages li[data-id=' + language + '] .delete')
+          .addEventListener('click', function() {
+            $('#languages')
+                .removeChild(
+                    $('li[data-language=' + this.getAttribute('data-language') +
+                      ']'));
+            printListModal();
+          });
+      $('dialog').close();
+    });
+
+    // About credits...
+    fetch('json/credits.json')
+        .then(res => res.json())
+        .then(json => {
+          var content = $('dialog#credits_dialog .content_area');
+          json.forEach(item => {
+            var div = document.createElement('div');
+            if (item.url) {
+              var a = document.createElement('a');
+              a.classList.add('homepage');
+              a.href = item.url;
+              a.target = '_blank';
+              a.textContent =
+                  chrome.i18n.getMessage('options_credits_homepage');
+              div.append(a);
+            }
+
+            var h4 = document.createElement('h4');
+            h4.textContent = item.name;
+            div.append(h4);
+
+            if (item.author) {
+              var p = document.createElement('p');
+              p.classList.add('author');
+              p.textContent = chrome.i18n.getMessage('options_credits_by') +
+                  ' ' + item.author +
+                  (item.license ? ' - ' + item.license : '');
+              div.append(p);
+            }
+            content.append(div);
+          });
+
+          window.onhashchange = function() {
+            if (location.hash == '#credits') {
+              $('dialog#credits_dialog').showModal();
+              $('#credits_ok').focus();
+            }
+          };
+
+          if (location.hash == '#credits') {
+            $('dialog#credits_dialog').showModal();
+            $('#credits_ok').focus();
+          }
+
+          $('#credits_ok').addEventListener('click', _ => {
+            $('dialog#credits_dialog').close();
+          });
+          $('dialog#credits_dialog').addEventListener('close', _ => {
+            history.pushState(
+                '', document.title,
+                window.location.pathname + window.location.search);
+          });
+
+          // Print language list in the modal dialog
+          printListModal();
+        })
+        .catch(err => console.log(err));
+  });
 }
 
 function saveOptions() {
-    var languages = document.getElementById('languages');
-    var options = {
-        uniquetab: '',
-        translateinto: {},
-    };
+  var languages = document.getElementById('languages');
+  var options = {
+    uniquetab: '',
+    translateinto: {},
+  };
 
-    options.uniquetab = radioSelected('uniquetab');
+  options.uniquetab = radioSelected('uniquetab');
 
-    var selected_languages = sortable.toArray();
+  var selected_languages = sortable.toArray();
 
-    var i = 0;
-    for (var language_id in selected_languages) {
-        var language = selected_languages[language_id];
-        options.translateinto[i] = language;
-        i++;
-    }
+  var i = 0;
+  for (var language_id in selected_languages) {
+    var language = selected_languages[language_id];
+    options.translateinto[i] = language;
+    i++;
+  }
 
-    chrome.storage.sync.set(options, function() {
-        var background = chrome.extension.getBackgroundPage();
+  chrome.storage.sync.set(options, function() {
+    var background = chrome.extension.getBackgroundPage();
 
-        background.translator_tab = false;
-        background.translator_window = false;
-        window.close();
-    });
+    background.translator_tab = false;
+    background.translator_window = false;
+    window.close();
+  });
 }
 
 function radioSelected(a) {
-    var elements = document.getElementsByName(a);
+  var elements = document.getElementsByName(a);
 
-    for (var i = 0; i < elements.length; i++)
-        if (elements[i].checked) return elements[i].value;
+  for (var i = 0; i < elements.length; i++)
+    if (elements[i].checked) return elements[i].value;
 }
 
 function inArray(needle, haystack) {
-    var length = haystack.length;
-    for (var i = 0; i < length; i++) {
-        if (haystack[i] == needle) return true;
-    }
-    return false;
+  var length = haystack.length;
+  for (var i = 0; i < length; i++) {
+    if (haystack[i] == needle) return true;
+  }
+  return false;
 }
 
 window.addEventListener('load', init);
diff --git a/src/json/credits.json b/src/json/credits.json
index e2e9882..9e8243e 100644
--- a/src/json/credits.json
+++ b/src/json/credits.json
@@ -1,30 +1,30 @@
 [
-	{
-		"name": "Metro Uinvert Dock Icon Set",
-		"url": "http://dakirby309.deviantart.com/art/Metro-Uinvert-Dock-Icon-Set-725-Icons-294529071",
-		"author": "dAKirby309"
-	},
-	{
-		"name": "Russian Translation",
-		"url": "https://code.google.com/r/sashasimkin-translateselectedtext/source/detail?r=fc4e58ee0d69929d610a84a7600338e99b9d3d83",
-		"author": "Alexander Simkin"
-	},
-	{
-		"name": "Sortable",
-		"url": "https://github.com/RubaXa/Sortable",
-		"author": "Lebedev Konstantin",
-		"license": "MIT License"
-	},
-	{
-		"name": "Chromium",
-		"url": "https://code.google.com/p/chromium/",
-		"author": "The Chromium Authors",
-		"license": "BSD-like License"
-	},
-	{
-		"name": "What-2-Nite",
-		"url": "https://github.com/enricolucia/what-2-nite/blob/master/isoLangs.json",
-		"author": "Google, Inc.",
-		"license": "MIT License"
-	}
+  {
+    "name": "Metro Uinvert Dock Icon Set",
+    "url": "http://dakirby309.deviantart.com/art/Metro-Uinvert-Dock-Icon-Set-725-Icons-294529071",
+    "author": "dAKirby309"
+  },
+  {
+    "name": "Russian Translation",
+    "url": "https://code.google.com/r/sashasimkin-translateselectedtext/source/detail?r=fc4e58ee0d69929d610a84a7600338e99b9d3d83",
+    "author": "Alexander Simkin"
+  },
+  {
+    "name": "Sortable",
+    "url": "https://github.com/RubaXa/Sortable",
+    "author": "Lebedev Konstantin",
+    "license": "MIT License"
+  },
+  {
+    "name": "Chromium",
+    "url": "https://code.google.com/p/chromium/",
+    "author": "The Chromium Authors",
+    "license": "BSD-like License"
+  },
+  {
+    "name": "What-2-Nite",
+    "url": "https://github.com/enricolucia/what-2-nite/blob/master/isoLangs.json",
+    "author": "Google, Inc.",
+    "license": "MIT License"
+  }
 ]
diff --git a/src/options.html b/src/options.html
index 104cacd..2765d1a 100644
--- a/src/options.html
+++ b/src/options.html
@@ -1,59 +1,62 @@
 <!DOCTYPE html>
 <html>
-	<head>
-		<meta charset="UTF-8">
-		<title>Options</title>
-		<link rel="stylesheet" type="text/css" href="css/options.css">
-		<link href='http://fonts.googleapis.com/css?family=Roboto:400,700,700italic,400italic' rel='stylesheet' type='text/css'>
-	</head>
-	<body>
-		<div id="credits_container">
-			<a href="#credits" id="credits" data-i18n="credits"></a>
-		</div>
 
-		<h1 id="welcome" data-i18n="welcome"></h1>
+<head>
+  <meta charset="UTF-8">
+  <title>Options</title>
+  <link rel="stylesheet" type="text/css" href="css/options.css">
+  <link href='http://fonts.googleapis.com/css?family=Roboto:400,700,700italic,400italic' rel='stylesheet' type='text/css'>
+</head>
 
-		<p id="introduction" data-i18n="introduction"></p>
+<body>
+  <div id="credits_container">
+    <a href="#credits" id="credits" data-i18n="credits"></a>
+  </div>
 
-		<div id="languages_container">
-			<ul id="languages"></ul>
-		</div>
-		<div id="languages_footer">
-			<button id="languages_add" data-i18n="addlanguage_addbutton"></button>
-		</div>
+  <h1 id="welcome" data-i18n="welcome"></h1>
 
-		<h2 id="otheroptionsheader" data-i18n="otheroptionsheader"></h2>
+  <p id="introduction" data-i18n="introduction"></p>
 
-		<div id="otheroptions">
-			<p><input type="radio" name="uniquetab" id="varioustabs" value=""> <label id="varioustabs_label" for="varioustabs" data-i18n="tabsoption_1"></label></p>
-			<p><input type="radio" name="uniquetab" id="uniquetab" value="yep"> <label id="uniquetab_label" for="uniquetab" data-i18n="tabsoption_2"></label></p>
-			<p><input type="radio" name="uniquetab" id="panel" value="panel"> <label id="panel_label" for="panel" data-i18n="tabsoption_3"></label></p>
-		</div>
+  <div id="languages_container">
+    <ul id="languages"></ul>
+  </div>
+  <div id="languages_footer">
+    <button id="languages_add" data-i18n="addlanguage_addbutton"></button>
+  </div>
 
-		<button id="save" data-i18n="savebutton"></button>
+  <h2 id="otheroptionsheader" data-i18n="otheroptionsheader"></h2>
 
-		<dialog id="languages_add_dialog">
-		  <h3 data-i18n="addlanguage"></h3>
-		  <div class="content_area">
-		    <label id="language_label" for="select_language" data-i18n="language_label"></label>
-		    <select id="select_language"></select>
-		  </div>
-		  <div class="action_buttons">
-		    <button id="languages_add_cancel" data-i18n="cancel"></button>
-		    <button id="languages_add_ok" data-i18n="ok"></button>
-		  </div>
-		</dialog>
-		<dialog id="credits_dialog">
-		  <h3 data-i18n="credits"></h3>
-		  <div class="content_area">
-		  </div>
-		  <div class="action_buttons">
-		    <button id="credits_ok" data-i18n="ok"></button>
-		  </div>
-		</dialog>
+  <div id="otheroptions">
+    <p><input type="radio" name="uniquetab" id="varioustabs" value=""> <label id="varioustabs_label" for="varioustabs" data-i18n="tabsoption_1"></label></p>
+    <p><input type="radio" name="uniquetab" id="uniquetab" value="yep"> <label id="uniquetab_label" for="uniquetab" data-i18n="tabsoption_2"></label></p>
+    <p><input type="radio" name="uniquetab" id="panel" value="panel"> <label id="panel_label" for="panel" data-i18n="tabsoption_3"></label></p>
+  </div>
 
-    <script src="js/common.js"></script>
-    <script src="js/options.js"></script>
-		<script src="js/sortable.js"></script>
-	</body>
+  <button id="save" data-i18n="savebutton"></button>
+
+  <dialog id="languages_add_dialog">
+    <h3 data-i18n="addlanguage"></h3>
+    <div class="content_area">
+      <label id="language_label" for="select_language" data-i18n="language_label"></label>
+      <select id="select_language"></select>
+    </div>
+    <div class="action_buttons">
+      <button id="languages_add_cancel" data-i18n="cancel"></button>
+      <button id="languages_add_ok" data-i18n="ok"></button>
+    </div>
+  </dialog>
+  <dialog id="credits_dialog">
+    <h3 data-i18n="credits"></h3>
+    <div class="content_area">
+    </div>
+    <div class="action_buttons">
+      <button id="credits_ok" data-i18n="ok"></button>
+    </div>
+  </dialog>
+
+  <script src="js/common.js"></script>
+  <script src="js/options.js"></script>
+  <script src="js/sortable.js"></script>
+</body>
+
 </html>