diff --git a/network/web/firefox/files/mozconfig b/network/web/firefox/files/mozconfig
index 00d76ba271..520ed23407 100755
--- a/network/web/firefox/files/mozconfig
+++ b/network/web/firefox/files/mozconfig
@@ -12,7 +12,7 @@ export CXX=clang++
 export AR=llvm-ar
 export NM=llvm-nm
 export RANLIB=llvm-ranlib
-
+ac_add_options --allow-addon-sideload
 ac_add_options --enable-official-branding
 
 # System libraries