For me there’s the filename followed by a map icon. Clicking on the map opens op Dolphin at the download folder as expected, but clicking on the file doesn’t always work. Files like PDFs work just fine, but Deb and Flatpakref files don’t open up the KDE package manager as expected. I’m not really sure why that is. Suppose it’s down to the handlers but I’m not sure how to configure that on Linux.
Funnily enough LibreWolf properly asks me what I want to do with a file and does it accordingly.
EDIT: I’ve fixed the issue, more or less. I was using the Flatpak version of Firefox and by default it seems to have very limited access. Adding a permission to allow access to my home folder fixes it. It’s probably not the most secure solution though.
It’s probably why companies like Reddit can get away with stuff like this. Most common users have no idea how much they’re being shat on. They couldn’t care less about the platform as long as they get their content.