diff --git a/browser/base/content/aboutRestartRequired.xhtml b/browser/base/content/aboutRestartRequired.xhtml
index 03cf2f5e3f85..df6fdcc59125 100644
--- a/browser/base/content/aboutRestartRequired.xhtml
+++ b/browser/base/content/aboutRestartRequired.xhtml
@@ -1,56 +1,43 @@
-<?xml version="1.0" encoding="UTF-8"?>
-
+<?xml version="1.0" encoding="UTF-8" ?>
 <!-- This Source Code Form is subject to the terms of the Mozilla Public
    - License, v. 2.0. If a copy of the MPL was not distributed with this
    - file, You can obtain one at http://mozilla.org/MPL/2.0/. -->
-
-<!DOCTYPE html [
-  <!ENTITY % htmlDTD
-    PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
-    "DTD/xhtml1-strict.dtd">
-  %htmlDTD;
-  <!ENTITY % globalDTD
-    SYSTEM "chrome://global/locale/global.dtd">
-  %globalDTD;
-  <!ENTITY % brandDTD SYSTEM "chrome://branding/locale/brand.dtd" >
-  %brandDTD;
-  <!ENTITY % restartRequiredDTD
-    SYSTEM "chrome://browser/locale/aboutRestartRequired.dtd">
-  %restartRequiredDTD;
-]>
+<!DOCTYPE html>
 
 <html xmlns="http://www.w3.org/1999/xhtml">
   <head>
-    <title>&restartRequired.title;</title>
+    <title data-l10n-id="restart-required-title"></title>
     <link rel="stylesheet" type="text/css" media="all"
           href="chrome://browser/skin/aboutRestartRequired.css"/>
     <!-- If the location of the favicon is changed here, the
          FAVICON_ERRORPAGE_URL symbol in
          toolkit/components/places/src/nsFaviconService.h should be updated. -->
-    <link rel="icon" id="favicon"
+    <link rel="icon" type="image/png" id="favicon"
           href="chrome://global/skin/icons/warning.svg"/>
+    <link rel="localization" href="branding/brand.ftl"/>
+    <link rel="localization" href="browser/aboutRestartRequired.ftl"/>
   </head>
-
-  <body dir="&locale.dir;">
+  <body>
     <!-- PAGE CONTAINER (for styling purposes only) -->
     <div id="errorPageContainer">
       <div id="text-container">
-        <div id="title">
-          <h1 id="title-text">&restartRequired.header;</h1>
+        <div>
+          <h1 id="title-text" data-l10n-id="restart-required-header"></h1>
         </div>
         <div id="errorLongContent">
-          <div id="errorLongDesc">&restartRequired.description;</div>
+          <div id="errorLongDesc">
+            <p data-l10n-id="restart-required-intro"></p>
+            <p data-l10n-id="restart-required-description"></p>
+          </div>
         </div>
       </div>
       <!-- Restart Button -->
       <div id="restartButtonContainer" class="button-container">
-        <button id="restart" class="primary" autocomplete="off"
-                onclick="AboutRestartRequired.restart();">
-          &restartButton.label;
-        </button>
+        <button id="restart" data-l10n-id="restart-button-label" class="primary" autocomplete="off"
+                onclick="AboutRestartRequired.restart();"></button>
       </div>
     </div>
   </body>
   <script type="text/javascript"
-           src="chrome://browser/content/aboutRestartRequired.js"/>
+          src="chrome://browser/content/aboutRestartRequired.js"/>
 </html>
diff --git a/browser/locales/en-US/browser/aboutRestartRequired.ftl b/browser/locales/en-US/browser/aboutRestartRequired.ftl
new file mode 100644
index 000000000000..563be4093b55
--- /dev/null
+++ b/browser/locales/en-US/browser/aboutRestartRequired.ftl
@@ -0,0 +1,11 @@
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+restart-required-title = Restart Required
+restart-required-header = Sorry. We just need to do one small thing to keep going.
+restart-required-intro = We have just installed an update in the background. Click Restart { -brand-short-name } to finish
+    applying it.
+restart-required-description = We will restore all your pages, windows and tabs afterwards, so you can be on your way quickly.
+
+restart-button-label = Restart { -brand-short-name }
diff --git a/browser/locales/en-US/chrome/browser/aboutRestartRequired.dtd b/browser/locales/en-US/chrome/browser/aboutRestartRequired.dtd
deleted file mode 100644
index 1b997324389b..000000000000
--- a/browser/locales/en-US/chrome/browser/aboutRestartRequired.dtd
+++ /dev/null
@@ -1,13 +0,0 @@
-<!-- This Source Code Form is subject to the terms of the Mozilla Public
-   - License, v. 2.0. If a copy of the MPL was not distributed with this
-   - file, You can obtain one at http://mozilla.org/MPL/2.0/. -->
-
-<!ENTITY restartRequired.title "Restart Required">
-
-<!ENTITY restartRequired.header "Sorry. We just need to do one small thing to keep going.">
-<!ENTITY restartRequired.description "
-<p>We have just installed an update in the background. Click Restart &brandShortName; to finish applying it.</p>
-<p>We will restore all your pages, windows and tabs afterwards, so you can be on your way quickly.</p>
-">
-
-<!ENTITY restartButton.label "Restart &brandShortName;">
diff --git a/browser/locales/jar.mn b/browser/locales/jar.mn
index 0640725780a0..2f8fbcbbd26b 100644
--- a/browser/locales/jar.mn
+++ b/browser/locales/jar.mn
@@ -18,7 +18,6 @@
     locale/browser/aboutPrivateBrowsing.dtd        (%chrome/browser/aboutPrivateBrowsing.dtd)
     locale/browser/aboutRobots.dtd                 (%chrome/browser/aboutRobots.dtd)
     locale/browser/accounts.properties             (%chrome/browser/accounts.properties)
-    locale/browser/aboutRestartRequired.dtd        (%chrome/browser/aboutRestartRequired.dtd)
     locale/browser/aboutSearchReset.dtd            (%chrome/browser/aboutSearchReset.dtd)
     locale/browser/aboutSessionRestore.dtd         (%chrome/browser/aboutSessionRestore.dtd)
     locale/browser/aboutTabCrashed.dtd             (%chrome/browser/aboutTabCrashed.dtd)
diff --git a/python/l10n/fluent_migrations/bug_1488788_aboutrestartrequired.py b/python/l10n/fluent_migrations/bug_1488788_aboutrestartrequired.py
new file mode 100644
index 000000000000..645b2ad987b4
--- /dev/null
+++ b/python/l10n/fluent_migrations/bug_1488788_aboutrestartrequired.py
@@ -0,0 +1,25 @@
+# coding=utf8
+
+# Any copyright is dedicated to the Public Domain.
+# http://creativecommons.org/publicdomain/zero/1.0/
+
+from __future__ import absolute_import
+import fluent.syntax.ast as FTL
+from fluent.migrate.helpers import transforms_from
+from fluent.migrate.helpers import TERM_REFERENCE
+from fluent.migrate import REPLACE
+
+def migrate(ctx):
+    """Bug 1488788- Migrate about:restartrequired from DTD to Fluent, part {index}."""
+
+    ctx.add_transforms(
+        "browser/browser/aboutRestartRequired.ftl",
+        "browser/browser/aboutRestartRequired.ftl",
+        transforms_from(
+"""
+restart-required-title = { COPY("browser/chrome/browser/aboutRestartRequired.dtd", "restartRequired.title") }
+
+restart-required-header = { COPY("browser/chrome/browser/aboutRestartRequired.dtd", "restartRequired.header") }
+""")
+        )
+
