Guys,
https://heatledger.com/ says

Your connection is not secure
The owner of heatledger.com has configured their website improperly. To protect your information from being stolen, Firefox has not connected to this website.

..and the https://heatwallet.com/ has been down for more than 24h now.

The connection has timed out
The server at heatwallet.com is taking too long to respond.

Could you perhaps spend some money and hire an admin..?