diff --git a/browser/base/content/browser.xhtml b/browser/base/content/browser.xhtml
index 4ec9628c17dc208690a4559f31aafebdc9f70692..6736f0eda2aa94ad99db1210a6ecddcd37cdb987 100644
--- a/browser/base/content/browser.xhtml
+++ b/browser/base/content/browser.xhtml
@@ -86,6 +86,7 @@
   <link rel="localization" href="toolkit/branding/brandings.ftl"/>
   <link rel="localization" href="toolkit/global/textActions.ftl"/>
   <link rel="localization" href="toolkit/printing/printUI.ftl"/>
+  <link rel="localization" href="browser/base-browser.ftl"/>
   <!-- Untranslated FTL files -->
   <link rel="localization" href="preview/firefoxSuggest.ftl" />
   <link rel="localization" href="preview/identityCredentialNotification.ftl" />
diff --git a/browser/locales/en-US/browser/base-browser.ftl b/browser/locales/en-US/browser/base-browser.ftl
new file mode 100644
index 0000000000000000000000000000000000000000..7eb49422b7dd6c30978aeff313215537ced53b6f
--- /dev/null
+++ b/browser/locales/en-US/browser/base-browser.ftl
@@ -0,0 +1,37 @@
+# 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/.
+
+## Language notification
+
+# $language (String) - The language Tor Browser is displayed in (already translated).
+language-notification-label-system = { -brand-short-name } has set your display language to { $language } based on your system’s language.
+# This is shown when the system language is not supported, so we fall back to another language instead.
+# $language (String) - The language Tor Browser is displayed in (already translated).
+language-notification-label = { -brand-short-name } has set your display language to { $language }.
+language-notification-button = Change Language…
+
+
+## Fullscreen/maximization notification shown when letterboxing is disabled
+
+basebrowser-rfp-maximize-warning-message = Maximizing the browser window can allow websites to determine your monitor size, which can be used to track you. We recommend that you leave browser windows in their original default size.
+basebrowser-rfp-restore-window-size-button-label = Restore
+basebrowser-rfp-restore-window-size-button-ak = R
+
+
+## Tooltip for the about:addons recommended badge
+
+basebrowser-addon-badge-recommended = Mozilla only recommends extensions that meet their standards for security and performance
+basebrowser-addon-badge-verified = Mozilla has reviewed this extension to meet their standards for security and performance
+
+## Option to show or hide the NoScript extension button/item.
+basebrowser-addon-noscript-visibility-label = Toolbar button
+basebrowser-addon-noscript-visibility-show = Show
+basebrowser-addon-noscript-visibility-hide = Hide
+
+## About dialog
+
+# "Mozilla Firefox" should be treated like a brand and it should be neither translated nor transliterated.
+# $version (String) - The current browser version. E.g. "12.5.3".
+# $firefoxVersion (String) - The version number of Firefox the current browser is based on. E.g. "102.15.0esr".
+basebrowser-about-dialog-version = { $version } (based on Mozilla Firefox { $firefoxVersion })