Is Easy to Save Image As (名前を付けて画像を保存) safe?

Save, copy, or copy links for images with configurable key-and-click shortcuts.

This extension adds shortcut actions for “Save image as,” “Copy image,” and “Copy image link” using a chosen key plus a chosen mouse click. It supports multiple keys pressed at the same time for the shortcut. Some images may not work depending on how the website displays them, such as cross-domain images, non-img-rendered images, or images covered by site layers.