--- a/js/moz.configure
+++ b/js/moz.configure
@@ -470,8 +470,16 @@ set_define('ENABLE_PIPELINE_OPERATOR', e
 def enable_build_binast(target, milestone):
     # For reasons unknown at this time, BinAST causes timeouts on win32
     # and failures on Android.
     if milestone.is_nightly and not (target.kernel == 'WINNT' and target.cpu == 'x86') and not (target.os == 'Android'):
         return True
 
 set_define('JS_BUILD_BINAST', enable_build_binast)
 set_config('JS_BUILD_BINAST', enable_build_binast)
+
+# FuzzyFox
+# ==============================================================
+js_option('--enable-fuzzyfox', help='Enable FuzzyFox')
+set_config('MOZ_FUZZYFOX',
+           depends_if('--enable-fuzzyfox')(lambda x: True))
+set_define('MOZ_FUZZYFOX',
+           depends_if('--enable-fuzzyfox')(lambda x: True))