When you open a template using the "load" URL parameter, it loads the template successfully in edge, but double-clicking a resource will cause it to go back to the default template.
Use this one as an example:
http://armviz.io/#/?load=https:%2F%2Fraw.githubusercontent.com%2FAzure%2Fazure-quickstart-templates%2Fmaster%2Fservice-fabric-unsecure-cluster-5-node-1-nodetype%2Fazuredeploy.json
Double click on a resource and you'll see the behavior.