Some constructive feedback to the site owner: Instead of having the webpage spend several minutes slowly loading thousands of barely-compressed 500x500 JPG images, please consider this advice:

1. Convert the images to WEBP or AVIF or at least run them through something like TinyPNG to compress them better.

2. Save two versions of each images; a 75x75 version that gets used for the 75px thumbnails shown on the page, and a 500x500 version that appears in the lightbox after a thumbnail is clicked.

3. Only load a few dozen thumbnails at first and then load more after the user scrolls down or clicks a "show more" type button.