1. Press on the little green lock to the left of the Newgrounds.com address bar.
2. To the right of "Firefox has blocked parts of this page that are not secure" press the [>] button to expand.
3. Press the "Disable protection for now" button.
4. The page should now reload with working leaderboards.
1. To the right of the Newgrounds.com address bar, press on the little shield icon with the red x.
2. Press "Load unsafe scripts"
3. The page should now reload with working leaderboards.