diff --git a/docker/scripts/start-slim.sh b/docker/scripts/start-slim.sh
index 592583eb3..3ffbc24b3 100755
--- a/docker/scripts/start-slim.sh
+++ b/docker/scripts/start-slim.sh
@@ -1,6 +1,6 @@
 #!/bin/bash
 
-firefox --version
+firefox --version 2>/dev/null
 
 SITESPEEDIO=/usr/src/app/bin/sitespeed.js
 
diff --git a/docker/scripts/start.sh b/docker/scripts/start.sh
index 27d905cf4..222fbd06b 100755
--- a/docker/scripts/start.sh
+++ b/docker/scripts/start.sh
@@ -8,7 +8,7 @@ elif [[ `which chromium-browser` ]]; then
 fi
 
 if [[ `which firefox` ]]; then
-   firefox --version
+   firefox --version 2>/dev/null
 fi
 
 if [[ `which microsoft-edge` ]]; then