lorpic/firefox-lorpic/app.js

(function() {
    // Code Here
    const formats = ['jpeg', 'jpg', 'png']
    let links = document.querySelectorAll('a[href]:not([itemprop])');

    links.forEach(function(link){
        let url = link.getAttribute('href');
        let ext = _getUrlExt(url);

        if(formats.includes(ext)){
            let content = link.textContent;

            if(content != 'Просмотр'){
                let image = document.createElement("img");

                image.setAttribute('class', 'lorpic');
                image.setAttribute('src', url);
                //link.replaceWith(image);
                link.appendChild(image);
                link.setAttribute('target', '_blank');
            }
        }
    });

    function _getUrlExt(url){
        return url.split('.').pop();
    }
})();