How can I properly apply a mask to an image?

Question

PHP

Good day. It is necessary to display images in uneven edges, with unusual rounding. Try to do it with a mask

mask: url(mask-stock.png);
      mask-repeat: no-repeat;
      mask-position: center center;
      mask-size: contain;

In Firefox, this doesn't work, I read what I need through svg, I tried to convert the image to SVG, but this is not enough, as it seems that the object needs to be like clip-path ..or something else)
What other ways are there? Here is an example of how the picture should look https://yadi.sk/i/aZb01FsHxqoWK

Answer 1

What's wrong with svg? https://jsfiddle.net/politonius/91yvqu1b/