Connection not secure shows up on onion sites

When I connect to any onion site and click on the "!" next to the back button it says "connection is not secure" and clicking on the ">" will also show the message "connection is not secure". Having these messages might cause Doubt with users weather a onion site is using end to end encryption. 'Obviously it's end to end encrypted but users that may not understand how the Tor protocol works. I made a video showing the message.

Trac:
Username: Dbryrtfbcbhgf