This extension hides photos on the web by default and shows them again with a simple tap. This means that all images are already hidden when you load a page until you activate them.

It's lightweight and simple and very convenient to use. When the pictures are hidden, you can easily reveal them back again by clicking the app icon. You can see the “hide” and “show” texts, indicating the status.

It also works on websites. You can prefer to have the images on a domain shown or not depending on your preference.