People recently figured out how to export stable diffusion to onnx so it’ll be exciting to see some actual web UIs for it soon (via quantized models and tfjs/onnxruntime for web)
A commenter mentioned today it might be possible to pre-download the model and load it into the browser from the local filesystem rather than include such a gigantic blob as an accompanying dependency, fighting different caching RFC's, security/usage restrictions, and anything else that might inadvertently trigger a re-download.