--- firefox-156018d359c66937b49d1794a8414f11c2f28cfd/configure.old
+++ firefox-156018d359c66937b49d1794a8414f11c2f28cfd/configure
@@ -5,6 +5,6 @@
 
 SRCDIR=$(dirname $0)
 TOPSRCDIR="$SRCDIR"
-PYTHON3="${PYTHON3:-python3}"
+PYTHON3="/usr/bin/python3.14"
 
 exec "$PYTHON3" "$TOPSRCDIR/configure.py" "$@"