I left a Squiffy edit session open during a browser restart. Not the first time it happened, the story/game came right back. This last time however, I opened the tab and the text field was completely blank. I tried closing it and reopening the edit file and it was still blank. Any way to restore it, or is it lost?

Open the story.js file as a text document. Paste everything into mrangel's desquiff tool. That will get your Squiffy code back.