diff --git a/profiles/desktop/package.mask b/profiles/desktop/package.mask
index 73be578e..c68f7134 100644
--- a/profiles/desktop/package.mask
+++ b/profiles/desktop/package.mask
@@ -4,3 +4,4 @@
 =dev-libs/icu-57.1 # not all packages ready for using new icu
 =app-office/libreoffice-bin-5.1.2.2-r1 # temporary mask as it requires new poppler/icu while other packages do not require
 >=kde-apps/kdenlive-15 # requires media-libs/mlt +qt5
+=www-client/firefox-45.2.0 # Problems with html5 after sleep mode + doesn't play several video formats