diff --git a/testing/firefox/files/mozconfig b/testing/firefox/files/mozconfig
index 3bf11ef8..ff229204 100644
--- a/testing/firefox/files/mozconfig
+++ b/testing/firefox/files/mozconfig
@@ -29,7 +29,7 @@ ac_add_options --disable-debug-symbols
 ac_add_options --disable-callgrind
 ac_add_options --disable-vtune
 
-# musl
+# Settings for musl.
 ac_add_options --disable-elf-hack
 ac_add_options --disable-gold
 ac_add_options --disable-jemalloc