diff --git a/background/commands.js b/background/commands.js
index 491eff0d1..4040b8cfe 100644
--- a/background/commands.js
+++ b/background/commands.js
@@ -45,7 +45,7 @@ var Commands = {
       registry[pair[0]] = Utils.makeCommand(pair[1]);
     }
   },
-  parseKeyMappings: function(line) {
+  parseKeyMappings: (function(line) {
     var key, lines, splitLine, mk = 0, _i = 0, _len, mkReg, registry, details, available;
     registry = CommandsData.keyToCommandRegistry = Object.create(null);
     mkReg = Object.create(null);
@@ -96,8 +96,8 @@ var Commands = {
       }
     }
     CommandsData.mapKeyRegistry = mk > 0 ? mkReg : null;
-  },
-  populateCommandKeys: function() {
+  }),
+  populateCommandKeys: (function() {
     var key, ref, ref2, arr, keyRe = Utils.keyRe, ch, j, last, tmp, func;
     ref = Object.create(null);
     for (ch = 10; 0 <= --ch; ) { ref[ch] = 1; }
@@ -144,7 +144,7 @@ var Commands = {
     }
     Settings.Init && Settings.Init();
     return ref;
-  },
+  }),
 
 defaultKeyMappings: [
   ["?", "showHelp"],
diff --git a/background/help_dialog.js b/background/help_dialog.js
index a0b186d37..9311ae319 100644
--- a/background/help_dialog.js
+++ b/background/help_dialog.js
@@ -1,6 +1,6 @@
 "use strict";
 var HelpDialog = {
-  render: function(request) {
+  render: (function(request) {
     var command, commandsToKey, key, ref = CommandsData.keyToCommandRegistry, result;
     Object.setPrototypeOf(request, null);
     commandsToKey = Object.create(null);
@@ -20,8 +20,8 @@ var HelpDialog = {
       return s != null ? s
         : HelpDialog.groupHtml(group, commandsToKey, CommandsData.availableCommands, showUnbound, showNames);
     });
-  },
-  groupHtml: function(group, commandsToKey, availableCommands, showUnbound, showNames) {
+  }),
+  groupHtml: (function(group, commandsToKey, availableCommands, showUnbound, showNames) {
     var bindings, command, html, isAdvanced, _i, _len, _ref, keys, description, push;
     html = [];
     _ref = this.commandGroups[group];
@@ -46,8 +46,8 @@ var HelpDialog = {
       }
     }
     return html.join("");
-  },
-  commandHtml: function(html, isAdvanced, bindings, description, command) {
+  }),
+  commandHtml: (function(html, isAdvanced, bindings, description, command) {
     html.push('<tr class="HelpTr', isAdvanced ? " HelpAdv" : "", '">\n\t');
     if (description) {
       html.push('<td class="HelpTd HelpKeys">'
@@ -62,7 +62,7 @@ var HelpDialog = {
         , bindings);
     }
     html.push("</td>\n</tr>\n");
-  },
+  }),
   commandGroups: {
     pageNavigation: ["scrollDown", "scrollUp", "scrollLeft", "scrollRight", "scrollToTop"
       , "scrollToBottom", "scrollToLeft", "scrollToRight", "scrollPageDown", "scrollPageUp"
@@ -98,9 +98,8 @@ var HelpDialog = {
     misc: ["showHelp", "autoCopy", "autoOpen", "searchAs", "searchInAnother", "toggleLinkHintCharacters"
       , "toggleSwitchTemp", "passNextKey", "debugBackground", "blank"]
   },
-  advancedCommands: {
-    __proto__: null
-    , toggleViewSource: 1, clearFindHistory: 1
+  advancedCommands: Object.setPrototypeOf({
+    toggleViewSource: 1, clearFindHistory: 1
     , scrollToLeft: 1, scrollToRight: 1, moveTabToNextWindow: 1
     , moveTabToNewWindow: 1, moveTabToIncognito: 1, reloadGivenTab: 1, focusOrLaunch: 1
     , goUp: 1, goToRoot: 1, focusInput: 1, "LinkHints.activateModeWithQueue": 1, enableCSTemp: 1
@@ -114,5 +113,5 @@ var HelpDialog = {
     , "LinkHints.activateModeToHover": 1, "LinkHints.unhoverLast": 1
     , toggleLinkHintCharacters: 1, toggleSwitchTemp: 1, "LinkHints.activateModeToLeave": 1
     , "Vomnibar.activateEditUrl": 1, "Vomnibar.activateEditUrlInNewTab": 1
-  }
+  }, null)
 };
diff --git a/background/others.js b/background/others.js
index a0f2ca394..426a52d8f 100644
--- a/background/others.js
+++ b/background/others.js
@@ -82,7 +82,7 @@ if (Settings.get("vimSync") === true) setTimeout(function() { if (!chrome.storag
   });
 }, 400);
 
-setTimeout(function() { if (!chrome.browserAction) { return; }
+setTimeout((function() { if (!chrome.browserAction) { return; }
   var func = Settings.updateHooks.showActionIcon, imageData, tabIds;
   function loadImageAndSetIcon(type, path) {
     var img, i, cache = Object.create(null), count = 0,
@@ -153,9 +153,9 @@ setTimeout(function() { if (!chrome.browserAction) { return; }
     }
   };
   Settings.postUpdate("showActionIcon");
-}, 150);
+}), 150);
 
-setTimeout(function() { if (!chrome.omnibox) { return; }
+setTimeout((function() { if (!chrome.omnibox) { return; }
   var last, firstResult, lastSuggest,
   tempRequest, timeout = 0, sessionIds, suggestions = null, outTimeout = 0, outTime,
   defaultSug = { description: "<dim>Open: </dim><url>%s</url>" },
@@ -291,7 +291,7 @@ setTimeout(function() { if (!chrome.omnibox) { return; }
   };
   chrome.omnibox.onInputChanged.addListener(onInput);
   chrome.omnibox.onInputEntered.addListener(onEnter);
-}, 600);
+}), 600);
 
 var a, cb;
 // According to tests: onInstalled will be executed after 0 ~ 16 ms if needed
@@ -354,11 +354,11 @@ setTimeout(function() {
 }, 500);
 });
 
-setTimeout(function() {
+setTimeout((function() {
   if (a) {
     a.removeListener(cb);
     chrome.runtime.onInstalled = a = null;
   }
   cb = function(b) { a = b; console.log(b); };
   Utils.resetRe();
-}, 1200);
+}), 1200);
diff --git a/background/utils.js b/background/utils.js
index 95162c06e..03e69735e 100644
--- a/background/utils.js
+++ b/background/utils.js
@@ -60,7 +60,7 @@ var Utils = {
   _jsNotEscapeRe: /["\[\]{}\u00ff-\uffff]|%(?![\dA-F]{2}|[\da-f]{2})/,
   filePathRe: /^['"]?((?:[A-Za-z]:[\\/]|\/(?:Users|home|root)\/)[^'"]*)['"]?$/,
   lastUrlType: 0,
-  convertToUrl: function(string, keyword, vimiumUrlWork) {
+  convertToUrl: (function(string, keyword, vimiumUrlWork) {
     string = string.trim();
     if (string.charCodeAt(10) === 58 && string.substring(0, 11).toLowerCase() === "javascript:") {
       if (Settings.CONST.ChromeVersion < 46 && string.indexOf('%', 11) > 0
@@ -175,7 +175,7 @@ var Utils = {
       : type === 1 ? ("http://" + oldString)
       : type === 2 ? ("http:" + oldString)
       : oldString;
-  },
+  }),
   checkSpecialSchemes: function(string, i, spacePos) {
     var isSlash = string[i + 1] === "/";
     switch (string.substring(0, i)) {
@@ -406,7 +406,7 @@ var Utils = {
     } catch (e) {}
     return url;
   },
-  parseSearchEngines: function(str, map) {
+  parseSearchEngines: (function(str, map) {
     var ids, pair, key, val, obj, _i, _len, ind, rSlash = /[^\\]\//, rules = [],
     rEscapeSpace = /\\\s/g, rSpace = /\s/, rEscapeS = /\\s/g, rColon = /\\:/g,
     rPercent = /\\%/g, rRe = /\sre=/i, a = str.replace(/\\\n/g, '').split('\n'),
@@ -489,12 +489,12 @@ var Utils = {
       obj.name = str ? this.DecodeURLPart(str) : ids[ids.length - 1].trimLeft();
     }
     return rules;
-  },
+  }),
   escapeAllRe: /[$()*+.?\[\\\]\^{|}]/g,
   _spaceOrPlusRe: /\\\+|%20| /g,
   _queryRe: /[#?]/,
   alphaRe: /[a-z]/i,
-  reparseSearchUrl: function (url, ind) {
+  reparseSearchUrl: (function (url, ind) {
     var prefix, str, str2, ind2;
     if (!this.protocolRe.test(url)) { return; }
     prefix = url.substring(0, ind - 1);
@@ -524,7 +524,7 @@ var Utils = {
       ).replace(this._spaceOrPlusRe, "(?:\\+|%20| )");
     prefix = this.prepareReparsingPrefix(prefix);
     return [prefix, new RegExp(str + str2 + url, this.alphaRe.test(str2) ? "i" : "")];
-  },
+  }),
   prepareReparsingPrefix: function(prefix) {
     if (prefix.startsWith("http://") || prefix.startsWith("https://")) {
       prefix = prefix.substring(prefix[4] === 's' ? 8 : 7);
@@ -572,11 +572,11 @@ var Utils = {
 };
 
 if (!String.prototype.startsWith) {
-String.prototype.startsWith = function(s) {
+String.prototype.startsWith = (function(s) {
   return this.length >= s.length && this.lastIndexOf(s, 0) === 0;
-};
-String.prototype.endsWith || (String.prototype.endsWith = function(s) {
+});
+String.prototype.endsWith || (String.prototype.endsWith = (function(s) {
   var i = this.length - s.length;
   return i >= 0 && this.indexOf(s, i) === i;
-});
+}));
 }
diff --git a/content/frontend.js b/content/frontend.js
index 94beffc88..2cdd90c71 100644
--- a/content/frontend.js
+++ b/content/frontend.js
@@ -50,12 +50,12 @@ var VSettings, VHUD, VPort, VEventMode;
     ClearPort: function() {
       vPort.port = null;
     },
-    connect: function(isFirst) {
+    connect: (function(isFirst) {
       var port, data = { name: "vimium++." + ((window.top === window) * 4 + document.hasFocus() * 2 + isFirst) };
       port = this.port = isInjected ? chrome.runtime.connect(VimiumInjector.id, data) : chrome.runtime.connect(data);
       port.onDisconnect.addListener(this.ClearPort);
       port.onMessage.addListener(this.Listener);
-    }
+    })
   };
   location.href !== "about:blank" || isInjected ? vPort.connect(1) :
   (window.onload = function() { window.onload = null; setTimeout(function() {
@@ -204,13 +204,13 @@ var VSettings, VHUD, VPort, VEventMode;
       HUD.enabled = true;
       ELs.OnWndFocus = vPort.safePost.bind(vPort, { handler: "frameFocused" });
     },
-    hook: function(f, c) {
+    hook: (function(f, c) {
       f("keydown", this.onKeydown, true);
       f("keyup", this.onKeyup, true);
       c || f("focus", this.onFocus, true);
       f("blur", this.onBlur, true);
       f.call(document, "DOMActivate", ELs.onActivate, true);
-    }
+    })
   };
   ELs.hook(addEventListener);
 
diff --git a/weidu/js/jqm.min.js b/weidu/js/jqm.min.js
index a458aeda9..fb3b43dfb 100644
--- a/weidu/js/jqm.min.js
+++ b/weidu/js/jqm.min.js
@@ -6,7 +6,7 @@
  * Copyright (C) <2011> by <appMobi>
  * Released under the MIT X11 License; 
  */
-var $=function(){
+var $=(function(){
 function u(a){return a in s?s[a]:s[a]=RegExp("(^|\\s)"+a+"(\\s|$)")}
 function o(a){for(var c=0;c<a.length;c++)a.indexOf(a[c])!=c&&(a.splice(c,1),c--);return a}
 function v(a,c){var b=[];if(a==f)return b;for(;a;a=a.nextSibling)a.nodeType==1&&a!==c&&b.push(a);return b}
@@ -72,4 +72,4 @@ d.uuid=function(){var a=function(){return((1+Math.random())*65536|0).toString(16
 d.fn.bind=function(a,c){for(var b=0;b<this.length;b++)q(this[b],a,c);return this};
 d.fn.unbind=function(a,c){for(var b=0;b<this.length;b++)r(this[b],a,c);return this};
 
-return d}();
\ No newline at end of file
+return d})();
\ No newline at end of file