diff --git a/todo.txt b/todo.txt
index ab82a4c8d..9296aca40 100755
--- a/todo.txt
+++ b/todo.txt
@@ -16,6 +16,8 @@ o replace appbundler with the Java 8 packager
 o   appbundler is no longer being developed by Oracle, switch to "packager"
 X   https://github.com/processing/processing/issues/3071
 X major clean-ups to the Contribution Manager code
+X Deal with a situation where the browser hangs on macOS
+X   https://github.com/fathominfo/processing-p5js-mode/issues/4
 
 contribs
 X Up-to-date status disappears after filter is removed