Yes, it's SauceNAO but with a wider range of options and you don't have to find and paste the image's URL every time you want to do a search.

You also have a nice trick for images that can't be downloaded through conventional methods like right-clicking on the picture: select the add-on image picker to get a preview (it's the original image!) that you can download easily.
Works like a charm for sites like Pixiv.

I hope 2 thinghs for the future of this extension: add more search engines and a "auto-mold" for A.I. images era.

Nice add, works exсellent

This extension focuses on it's core function and works extremely well and extremely fast. I'd like to see a few enhancements, but those would be quality of life, not essential. Love it.

Superb way to search images via many options.