2: Website memory storage. Sometimes, the site keeps the files on the ROM, and sometimes, it doesn't. I'd really like to see this improved because I have to have DoorsCSE in my downloads folder taking up unnecessary space on my PC in case for some reason it's not saved.
In regards to this... jsTIfied utilizes DOM storage in the browser to avoid any legal issues with keeping the ROM on our server. Since files like DoorCSE are uploaded to the ROM, not to the server, we can't keep the state of the calculator if you reupload the ROM.
Since the DOM Storage is part of the browser cache there's really nothing we can do. The cache may also be purged when the computer is restarted, or by quitting the browser. :/