diff --git a/common/modules/base.jsm b/common/modules/base.jsm
index d60f70f2..4f88164c 100644
--- a/common/modules/base.jsm
+++ b/common/modules/base.jsm
@@ -230,9 +230,9 @@ Runnable.prototype.QueryInterface = XPCOMUtils.generateQI([Ci.nsIRunnable]);
  */
 function debuggerProperties(obj) {
     if (loaded.services && services.debugger.isOn) {
-        let ret = {};
-        services.debugger.wrapValue(obj).getProperties(ret, {});
-        return ret.value;
+        let res = {};
+        services.debugger.wrapValue(obj).getProperties(res, {});
+        return res.value;
     }
 }
 
@@ -1487,20 +1487,20 @@ var array = Class("array", Array, {
      * @returns {Array}
      */
     uniq: function uniq(ary, unsorted) {
-        let ret = [];
+        let res = [];
         if (unsorted) {
             for (let item in values(ary))
-                if (ret.indexOf(item) == -1)
-                    ret.push(item);
+                if (res.indexOf(item) == -1)
+                    res.push(item);
         }
         else {
             for (let [, item] in Iterator(ary.sort())) {
-                if (item != last || !ret.length)
-                    ret.push(item);
+                if (item != last || !res.length)
+                    res.push(item);
                 var last = item;
             }
         }
-        return ret;
+        return res;
     },
 
     /**
diff --git a/common/modules/javascript.jsm b/common/modules/javascript.jsm
index a2c18266..7d9eeff5 100644
--- a/common/modules/javascript.jsm
+++ b/common/modules/javascript.jsm
@@ -180,8 +180,7 @@ var JavaScript = Module("javascript", {
             this._top.statements.pop();
         this._top = this._get(-2);
         this._last = this._top.char;
-        let ret = this._stack.pop();
-        return ret;
+        return this._stack.pop();
     },
 
     _buildStack: function (filter) {
diff --git a/common/modules/options.jsm b/common/modules/options.jsm
index 4717b5e8..31684cba 100644
--- a/common/modules/options.jsm
+++ b/common/modules/options.jsm
@@ -872,54 +872,54 @@ var Options = Module("options", {
      * @returns {Object} The parsed command object.
      */
     parseOpt: function parseOpt(args, modifiers) {
-        let ret = {};
+        let res = {};
         let matches, prefix, postfix;
 
-        [matches, prefix, ret.name, postfix, ret.valueGiven, ret.operator, ret.value] =
+        [matches, prefix, res.name, postfix, res.valueGiven, res.operator, res.value] =
         args.match(/^\s*(no|inv)?([^=]+?)([?&!])?\s*(([-+^]?)=(.*))?\s*$/) || [];
 
-        ret.args = args;
-        ret.onlyNonDefault = false; // used for :set to print non-default options
+        res.args = args;
+        res.onlyNonDefault = false; // used for :set to print non-default options
         if (!args) {
-            ret.name = "all";
-            ret.onlyNonDefault = true;
+            res.name = "all";
+            res.onlyNonDefault = true;
         }
 
         if (matches) {
-            ret.option = this.get(ret.name, ret.scope);
-            if (!ret.option && (ret.option = this.get(prefix + ret.name, ret.scope))) {
-                ret.name = prefix + ret.name;
+            res.option = this.get(res.name, res.scope);
+            if (!res.option && (res.option = this.get(prefix + res.name, res.scope))) {
+                res.name = prefix + res.name;
                 prefix = "";
             }
         }
 
-        ret.prefix = prefix;
-        ret.postfix = postfix;
+        res.prefix = prefix;
+        res.postfix = postfix;
 
-        ret.all = (ret.name == "all");
-        ret.get = (ret.all || postfix == "?" || (ret.option && ret.option.type != "boolean" && !ret.valueGiven));
-        ret.invert = (prefix == "inv" || postfix == "!");
-        ret.reset = (postfix == "&");
-        ret.unsetBoolean = (prefix == "no");
+        res.all = (res.name == "all");
+        res.get = (res.all || postfix == "?" || (res.option && res.option.type != "boolean" && !res.valueGiven));
+        res.invert = (prefix == "inv" || postfix == "!");
+        res.reset = (postfix == "&");
+        res.unsetBoolean = (prefix == "no");
 
-        ret.scope = modifiers && modifiers.scope;
+        res.scope = modifiers && modifiers.scope;
 
-        if (!ret.option)
-            return ret;
+        if (!res.option)
+            return res;
 
-        if (ret.value === undefined)
-            ret.value = "";
+        if (res.value === undefined)
+            res.value = "";
 
-        ret.optionValue = ret.option.get(ret.scope);
+        res.optionValue = res.option.get(res.scope);
 
         try {
-            ret.values = ret.option.parse(ret.value);
+            res.values = res.option.parse(res.value);
         }
         catch (e) {
-            ret.error = e;
+            res.error = e;
         }
 
-        return ret;
+        return res;
     },
 
     /**
diff --git a/common/modules/storage.jsm b/common/modules/storage.jsm
index eeadf2c7..28ad0e8d 100644
--- a/common/modules/storage.jsm
+++ b/common/modules/storage.jsm
@@ -83,20 +83,20 @@ var ArrayStore = Class("ArrayStore", StoreBase, {
     },
 
     pop: function pop(value) {
-        var ret = this._object.pop();
+        var res = this._object.pop();
         this.fireEvent("pop", this._object.length);
-        return ret;
+        return res;
     },
 
     truncate: function truncate(length, fromEnd) {
-        var ret = this._object.length;
+        var res = this._object.length;
         if (this._object.length > length) {
             if (fromEnd)
                 this._object.splice(0, this._object.length - length);
             this._object.length = length;
             this.fireEvent("truncate", length);
         }
-        return ret;
+        return res;
     },
 
     // XXX: Awkward.
diff --git a/common/modules/template.jsm b/common/modules/template.jsm
index 702876fe..c08e98ba 100644
--- a/common/modules/template.jsm
+++ b/common/modules/template.jsm
@@ -90,19 +90,19 @@ var Template = Module("Template", {
         XML.ignoreWhitespace = false; XML.prettyPrinting = false;
         if (iter.length) // FIXME: Kludge?
             iter = array.iterValues(iter);
-        let ret = <></>;
+        let res = <></>;
         let n = 0;
         for each (let i in Iterator(iter)) {
             let val = func(i, n);
             if (val == undefined)
                 continue;
             if (n++ && sep)
-                ret += sep;
+                res += sep;
             if (interruptable && n % interruptable == 0)
                 util.threadYield(true, true);
-            ret += val;
+            res += val;
         }
-        return ret;
+        return res;
     },
 
     bindings: {
diff --git a/teledactyl/content/mail.js b/teledactyl/content/mail.js
index 9e3147eb..ff01820c 100644
--- a/teledactyl/content/mail.js
+++ b/teledactyl/content/mail.js
@@ -132,15 +132,15 @@ const Mail = Module("mail", {
     /** @property {nsISmtpServer[]} The list of configured SMTP servers. */
     get smtpServers() {
         let servers = services.smtp.smtpServers;
-        let ret = [];
+        let res = [];
 
         while (servers.hasMoreElements()) {
             let server = servers.getNext();
             if (server instanceof Ci.nsISmtpServer)
-                ret.push(server);
+                res.push(server);
         }
 
-        return ret;
+        return res;
     },
 
     composeNewMail: function (args) {