The source of the background tiles is using the http protocol rather than https. As a result the site is not showing as secure on Chrome and receives a security warning on Firefox:
The tile server basemaps.cartocdn.com is also available using https.
There are also a few external links, in index.html and README.md, that can also be upgraded to https, although they do not impact the above warning.
The source of the background tiles is using the
httpprotocol rather thanhttps. As a result the site is not showing as secure on Chrome and receives a security warning on Firefox:The tile server
basemaps.cartocdn.comis also available usinghttps.There are also a few external links, in index.html and README.md, that can also be upgraded to
https, although they do not impact the above warning.