Looks like I've now had my second instance of the website DB game-entry UI freezing up/hanging/locking up and losing all information, after 20 minutes of entering information into it.
I know bugs and such are a fact of life in this kind of thing -- would be lovely if there was a way to make entered information recoverable if this happens. Kind of a downer to lose all that (especially a purpose-written description). I know the safe thing would be to compose in another text editor and copy/paste in, but that's not so easy with release info, etc.
But overall, just posting for awareness in case this hasn't been seen before. Firefox, Win10, seems to have a small risk of happening during drop-down/search fields being used. Once it happens, tab can't be changed, nothing responds to clicking, Firefox eventually reports that the page is not responding and offers to stop it. Tried waiting several minutes, but did resume responsiveness. Once you let the browser stop the page, you have to reload it and then you're back at clean slate.