Revert "firefox: update to 53.0.2."

This reverts commit c06913f737.

Fails to build, see:

https://build.voidlinux.eu/builders/x86_64_builder/builds/2520/steps/shell_3/logs/stdio

srcpkgs/firefox/template

@@ -1,13 +1,13 @@
 # Template build file for 'firefox'.
 pkgname=firefox
-version=53.0.2
-revision=1
+version=53.0
+revision=2
 short_desc="Mozilla Firefox web browser"
 maintainer="Juan RP <xtraeme@voidlinux.eu>"
 homepage="https://www.mozilla.org/firefox/"
 license="MPL-2.0, GPL-2, LGPL-2.1"
 distfiles="${MOZILLA_SITE}/${pkgname}/releases/${version}/source/${pkgname}-${version}.source.tar.xz"
-checksum=c536df9794fafe61e4e74562e2a37cd4a6fb1c13d99d5330d61be03b2d57ae54
+checksum=4ed1b23ea7c08f81a08817ddf3b4f06849e01420ee074008b6f390366e95b7d0
 
 only_for_archs="i686 i686-musl x86_64 x86_64-musl"
 nopie=yes
@@ -23,7 +23,7 @@ makedepends="
  $(vopt_if gtk3 gtk+3-devel) $(vopt_if pulseaudio pulseaudio-devel)
  $(vopt_if startup_notification startup-notification-devel)
  $(vopt_if xscreensaver libXScrnSaver-devel)"
-depends="nss>=3.29 desktop-file-utils hicolor-icon-theme"
+depends="nss>=3.27 desktop-file-utils hicolor-icon-theme"
 conflicts="firefox-esr>=0"
 
 build_options="alsa dbus gtk3 rust pulseaudio startup_notification xscreensaver"