Before the extension has been enabled, if you go into “registries” and add a registry, you will see the following:
Once you have your license key, go into extensions, and paste in the key..
The available extensions will update with your license details.
Go back into registries, and you can now see browse is available.
First time using the extension (per registry) you will be prompted for additional configuration elements; click on “configure this registry”
Verify your registry config (note that you need to have TLS enabled registry to browse, so at a minimum, enable TLS and select “skip certificate validation”
Once configured, you can browse the registry
You can inspect an repository (aka image), add tags, update existing tags, remove tags, you can even delete an entire repository (image).