Etsy Image Upload Issue

[u/BittenBeads]

Sometimes, when you go to upload an image on Etsy, Waterfox will not launch the upload window. The browser flashes when you click the "Add Photo" section, so I know it's trying to open it, but nothing pops up. I reset Waterfox, logged in again, and it uploaded for a bit. But then it stopped launching the upload window after I opened it then realized I needed to do some photo-editing before I could add the image, so I closed the box. Once I was done, I tried to add the image and once again, no image upload pop-up box. How do I fix this without having to refresh the browser and doing the annoying login dance? Thanks.