diff --git a/browser/base/content/syncGenericChange.xul b/browser/base/content/syncGenericChange.xul
index 20c6c7528dc..bfb71816ea7 100644
--- a/browser/base/content/syncGenericChange.xul
+++ b/browser/base/content/syncGenericChange.xul
@@ -108,9 +108,6 @@
       </rows>
     </grid>
     <hbox id="passphraseBackupButtons">
-      <button label="&button.syncKeyBackup.email.label;"
-              accesskey="&button.syncKeyBackup.email.accesskey;"
-              oncommand="gSyncUtils.passphraseEmail('passphraseBox');"/>
       <button label="&button.syncKeyBackup.print.label;"
               accesskey="&button.syncKeyBackup.print.accesskey;"
               oncommand="gSyncUtils.passphrasePrint('passphraseBox');"/>
diff --git a/browser/base/content/syncSetup.xul b/browser/base/content/syncSetup.xul
index dd9c0549255..348149492a7 100644
--- a/browser/base/content/syncSetup.xul
+++ b/browser/base/content/syncSetup.xul
@@ -229,10 +229,6 @@
     <groupbox align="center">
       <description>&syncKeyBackup.description;</description>
       <hbox>
-        <button label="&button.syncKeyBackup.email.label;"
-                accesskey="&button.syncKeyBackup.email.accesskey;"
-                oncommand="gSyncUtils.passphraseEmail('weavePassphrase');
-                           gSyncSetup.afterBackup();"/>
         <button label="&button.syncKeyBackup.print.label;"
                 accesskey="&button.syncKeyBackup.print.accesskey;"
                 oncommand="gSyncUtils.passphrasePrint('weavePassphrase');
diff --git a/browser/base/content/syncUtils.js b/browser/base/content/syncUtils.js
index 017743cacf0..0a018ad65ab 100644
--- a/browser/base/content/syncUtils.js
+++ b/browser/base/content/syncUtils.js
@@ -146,31 +146,6 @@ let gSyncUtils = {
     return pp;
   },
 
-  /**
-   * Trigger the mailto protocol handler to send a passphrase backup email.
-   * 
-   * @param elid : ID of the form element containing the passphrase.
-   */
-  passphraseEmail: function(elid) {
-    let pp = document.getElementById(elid).value;
-    let subject = this.bundle.GetStringFromName("email.syncKey.subject");
-    let label = this.bundle.formatStringFromName("email.syncKey.label", [pp], 1);
-    let body = "&body=" + label + "%0A%0A" +
-               this.bundle.GetStringFromName("email.syncKey.description")
-               + "%0A%0A" +
-               this.bundle.GetStringFromName("email.keepItSecret.label") +
-               this.bundle.GetStringFromName("email.keepItSecret.description")
-               + "%0A%0A" +
-               this.bundle.GetStringFromName("email.keepItSafe.label") +
-               this.bundle.GetStringFromName("email.keepItSafe.description")
-               + "%0A%0A" +
-               this.bundle.GetStringFromName("email.findOutMore.label");
-    let uri = Weave.Utils.makeURI("mailto:?subject=" + subject + body);
-    let protoSvc = Cc["@mozilla.org/uriloader/external-protocol-service;1"]
-                     .getService(Ci.nsIExternalProtocolService);
-    protoSvc.loadURI(uri);
-  },
-
   /**
    * Prepare an invisible iframe with the passphrase backup document.
    * Used by both the print and saving methods.
diff --git a/browser/locales/en-US/chrome/browser/syncSetup.dtd b/browser/locales/en-US/chrome/browser/syncSetup.dtd
index 7a6ef7e63ba..2482bc02a6a 100644
--- a/browser/locales/en-US/chrome/browser/syncSetup.dtd
+++ b/browser/locales/en-US/chrome/browser/syncSetup.dtd
@@ -45,8 +45,6 @@
 <!ENTITY syncKeyGenerate.label     "Generate">
 <!ENTITY syncKeyBackup.description "Your Sync Key is required to access &syncBrand.fullName.label; on other machines. Please create a backup copy. We cannot help you recover your Sync Key.">
 
-<!ENTITY button.syncKeyBackup.email.label     "Email…">
-<!ENTITY button.syncKeyBackup.email.accesskey "E">
 <!ENTITY button.syncKeyBackup.print.label     "Print…">
 <!ENTITY button.syncKeyBackup.print.accesskey "P">
 <!ENTITY button.syncKeyBackup.save.label      "Save…">
diff --git a/browser/locales/en-US/chrome/browser/syncSetup.properties b/browser/locales/en-US/chrome/browser/syncSetup.properties
index cd0461b7e2f..4abd38a26c0 100644
--- a/browser/locales/en-US/chrome/browser/syncSetup.properties
+++ b/browser/locales/en-US/chrome/browser/syncSetup.properties
@@ -25,17 +25,6 @@ historyDaysCount.label      = %S day of history;%S days of history
 # http://developer.mozilla.org/en/docs/Localization_and_Plurals
 passwordsCount.label        = %S password;%S passwords
 
-# LOCALIZATION NOTE (email.synckey.*): "Firefox Sync" should match
-# &syncBrand.fullName.label; from syncBrand.dtd
-email.syncKey.subject          = Your Firefox Sync Key
-email.syncKey.label            = Your Firefox Sync Key: %S
-email.syncKey.description      = This key is used to decode the data in your Firefox Sync account. You will need to enter the key each time you configure Firefox Sync on a new computer or device.
-email.keepItSecret.label       = Keep it secret!\u0020
-email.keepItSecret.description = Your Firefox Sync account is encrypted to protect your privacy. Without this key, it would take years for anyone to decode your personal information. You are the only person who holds this key. This means you're the only one who can access your Firefox Sync data.
-email.keepItSafe.label         = Keep it safe!\u0020
-email.keepItSafe.description   = Do not lose this key. We don't keep a copy of your key (that wouldn't be keeping it secret!) so we can't help you recover it if it's lost. You'll need to use this key any time you connect a new computer or device to Firefox Sync.
-email.findOutMore.label        = Find out more about Firefox Sync and your privacy at https://services.mozilla.com.
-
 save.synckey.title = Save Sync Key
 
 newAccount.action.label = Firefox Sync is now set up to automatically sync all of your browser data.