Base Browser strings

This commit adds all the strings needed by following Base Browser
patches.

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/languageNotification.ftl"/>
   <!-- Untranslated FTL files -->
   <link rel="localization" href="preview/firefoxSuggest.ftl" />
   <link rel="localization" href="preview/identityCredentialNotification.ftl" />

browser/locales/en-US/browser/languageNotification.ftl

+# 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/.
+
+# These strings are used by the Base Browser part of the changeset, not only for
+# the language notification.
+# TODO: Rename this file to make this clearer
+
+
+## Language notification
+
+# $language is 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 is 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