'On-image navigation, but still allow right-click-save in Firefox

I'm probably missing something obvious, but is it possible to have on-image navigation, but still allow the visitor to right-click-save the image in Firefox? I'm using a very simple, absolutely positioned overlay to handle the previous/next duties, but that makes it impossible to right-click and save the image in Firefox. Firefox offers to save the link, but not the image itself. In Chrome and Edge, it's not a problem.

Stripped down, the code is very simple:

<!DOCTYPE html>
<html lang='en'>
<head>
<meta charset='UTF-8'>
<style>
#slide {
    position: relative;
    width: 1344px;
    height: 900px;
}
#prev {
    position: absolute;
    top: 0;
    bottom: 0;
    left: 0;
    width: 40%;
}
#next {
    position: absolute;
    top: 0;
    bottom: 0;
    right: 0;
    width: 60%;
}
</style>
</head>
<body>
<div id='slide'>
<a href='a01.html' id='prev' title='Previous image'></a>
<a href='a03.html' id='next' title='Next image'></a>
<img src='a02.jpg' width='1344' height='900' alt=''>
</div>
</body>
</html>

Changing browser settings, or using an add-on, is not an option - this is directed at site visitors, whose settings I can't change.



Sources

This article follows the attribution requirements of Stack Overflow and is licensed under CC BY-SA 3.0.

Source: Stack Overflow

Solution Source