This extension is for AUTOMATIC1111's Stable Diffusion web UI
Allows swapping and maintaining config files from a separate UI tab. In practice, due to extensions, save locations, and other important configurations being stored in the... well, config file, this essentially creates different "profiles".
e.g. have a sfw profile with the nsfw-censor extension enabled, and a separate output directory so other images aren't visible in image-viewer, etc.