Firefox crashing on me, WordPress misbehaviour, et all don’t happen to me all that often. But when something does go wrong, it usually takes The Best Post of the Millenium ™ with it. Autosave is a feature that has been present for years in word processors. It started to show up in web tools during the last couple of years, and I’d be glad to see it implemented in WordPress, as BloggingPro hints might happen very soon. But on the other hand, I’m not even desperate enough to install the plugin.