I tried my game with firefox and discovered I have the same problem as you. Can't recall ever hearing about this problem before, and I don't use firefox, I use chrome, so I have no idea if this is a new thing or why it happens.The problem is not that save files are gone but that they dont automatically show up when playing a new update.
For example, when i downloaded your game's latest update a while back, i couldn't see any save files to load but luckily i hadn't deleted the previous version and when i opened that up the save files were present, so all i had to do was save to file and load from file to transfer them.
I initially thought it was just something to do with your game, maybe you changed something but since then it has happened with multiple other games. I never had this problem with chrome just with firefox.
Also i used something called Hiev's local storage manager which allowed me to see my Html save files but it doesn't work with firefox and was wondering if something like that existed for firefox.
Edit : Upon further testing it seems to be location specific. If i just copy the game folder to someplace else the save files disappear and reappear when i move the game back to its original folder. That seems to be the issue in firefox
ProbablyEdit : Upon further testing it seems to be location specific. If i just copy the game folder to someplace else the save files disappear and reappear when i move the game back to its original folder. That seems to be the issue in firefox
I followed the instructions to disable it, but that didn't fix the problem. Though, it's possible you must clear the cache/cookies too, which I didn't.ProbablyYou must be registered to see the links.
I believe that was how it always worked if you run these games directly through the browser, even during the flash era I remember having issues with persistent saving if I changed the file name/location and why I often kept manual save backups just to be safe.I tried my game with firefox and discovered I have the same problem as you. Can't recall ever hearing about this problem before, and I don't use firefox, I use chrome, so I have no idea if this is a new thing or why it happens.
Chrome doesn't have this issue though.I believe that was how it always worked if you run these games directly through the browser, even during the flash era I remember having issues with persistent saving if I changed the file name/location and why I often kept manual save backups just to be safe.
I'm not sure it is an issue as much as simply how it was designed, it probably creates different cached folders for different filepaths.Chrome doesn't have this issue though.