Hey! As far as I know, GX.games doesn’t really let you directly download save files for games like DPS.Idle. The progress is usually stored in your browser’s local storage, which is why switching browsers often resets everything.
If you want to back it up, you could check your browser’s developer tools and export the local storage/cookies for that game 🔧. It’s a bit technical, but it’s the only way to keep a copy safe on your computer.
Hopefully the devs add a proper export/import option later on, it would make life a lot easier for players 😊.