How to access the local WebModel with Firefox (version 68.0 or higher) (KB10393)

To access the WebModel with Firefox a security setting must be disabled.

Proceed as follows: 

1. Open the Firefox browser
2. Enter "about:config" in the address line
3. Look for the entry "security.fileuri.strict_origin_policy"
4. Change the value to "false" (right click > toggle)

before

after

Now the WebModel can be called again from the local file system or from a file server.