Updates from bedrock (#421)

From file changes in mozilla/bedrock@8662888

en/download_button.ftl

@@ -71,3 +71,6 @@ download-button-linux-64-v2 = Download for Linux 64-bit
 #   $attrs (attrs) - link to https://support.mozilla.org/kb/install-firefox-linux#w_install-firefox-deb-package-for-debian-based-distributions
 # Note: Debian and Ubuntu are brand names and shouldn't be translated
 download-button-using-debian = Using Debian, Ubuntu or any Debian-based distribution?<br> You can set up our <a { $attrs }>APT repository instead</a>.
+
+# Microsoft Windows Store badge
+download-button-get-it-from-microsoft = Get it from Microsoft