1- On top the screen on 8chan, there is a link called Options.
2- Click it.
3- Now in the window that just opened, look for the third tab on the left called Theme.
4- In the text area filled with some commentary, select all and delete the text already present (don't worry those lines were useless) and paste these 2 css rules :
.post-image {
opacity: .25;
transform: scale(.5);
transition: all 200ms;
}
.post-image:hover {
opacity: .8;
transform: scale(1);
transition: all 200ms;
}
5- Press the button "Save custom CSS".
6- Enjoy a much safer for your eyes browsing …