diff --git a/srcpkgs/firefox/template b/srcpkgs/firefox/template
index 0e60377f9bb..f68046376f5 100644
--- a/srcpkgs/firefox/template
+++ b/srcpkgs/firefox/template
@@ -3,15 +3,15 @@
 # THIS PKG MUST BE SYNCHRONIZED WITH "srcpkgs/firefox-i18n".
 #
 pkgname=firefox
-version=66.0.3
-revision=2
+version=66.0.4
+revision=1
 build_helper="rust"
 short_desc="Mozilla Firefox web browser"
 maintainer="Johannes <johannes.brechtmann@gmail.com>"
 license="MPL-2.0, GPL-2.0-or-later, LGPL-2.1-or-later"
 homepage="https://www.mozilla.org/firefox/"
 distfiles="${MOZILLA_SITE}/${pkgname}/releases/${version}/source/${pkgname}-${version}.source.tar.xz"
-checksum=1fe4cfe4f4afce8d5532da8f36a48c333750c90a6ee67167309357edf514c22a
+checksum=7ac6fae17e402276483fbfbb6b320d61e6695a28f1112ba2c987127f105dc25d
 
 lib32disabled=yes