diff -up uBlock-1.28.2/tools/make-firefox.sh.py3 uBlock-1.28.2/tools/make-firefox.sh
--- uBlock-1.28.2/tools/make-firefox.sh.py3	2020-07-11 15:26:44.000000000 +0200
+++ uBlock-1.28.2/tools/make-firefox.sh	2020-07-13 13:16:00.501025776 +0200
@@ -34,7 +34,7 @@ rm $DES/js/vapi-usercss.pseudo.js
 rm $DES/img/icon_128.png
 
 echo "*** uBlock0.firefox: Generating meta..."
-python tools/make-firefox-meta.py $DES/
+python3 tools/make-firefox-meta.py $DES/
 
 if [ "$1" = all ]; then
     echo "*** uBlock0.firefox: Creating package..."