Recently, the 500px.com platform has restricted access to favorites photos in order to force the user to purchase of a premium status.
These steps allow you to upload your favorites library in JSON format.
// prepare page
document.querySelector('#root > [class^="StyledLayout__Box"]').style.overflow = "scroll"; // add scroll to sidebar
// now sroll to end page, please
// run next code to continue
let links = document.querySelectorAll('#root [class^="StyledLayout__Container"] [id^="photo-"] a[role="link"]'); // get all image links
// packing links in `JSON`
let links_objs = [];
for (link of links){
let img = link.querySelector('img');
links_objs.push({'page': link.href, 'url': img ? img.src : null});
}
//let links_json = JSON.stringify(links_objs, null, 4); // indent formatted
let links_json = JSON.stringify(links_objs); // in single line
console.log(links_json);