Imouto Extension is a free Chrome add-on developed by ImoutoChan. It serves as a supplement to the ImoutoRebirth solution and is specifically designed for booru sites.

With the Imouto Extension, your saved images on booru sites will be highlighted with red borders, making them easily distinguishable. Additionally, associated images will be highlighted with green borders, allowing you to quickly identify related content.

One of the convenient features of this extension is the ability to remove the opacity of the borders by simply hovering over the image. This allows for a clear view of the image without any obstructions.

To temporarily disable the borders, you can click on the extension logo. This provides flexibility and control over the highlighting feature.

Overall, Imouto Extension is a useful tool for users who frequently browse booru sites and want to easily identify and navigate through their saved images and related content.