papa_bear parent
Pretty sure downloading it to your browser counts as distributing it, legally speaking.
I think it's a bit more subtle than that. The code of this tool runs in your browser and makes it download the model from huggingface. So it does not host the model or provide it to you, it just does the download on your behalf directly from where the owner of the model put it. The author of this tool is not providing the model to you, just automating the download for you.
Not saying it's not a copyright violation, and IANAL, but it's not a obvious one.