Hi Firefox community, I've enjoyed using Firefox for a while, and without complaint, until yesterday and I'm hoping you can help. Approximately 4 days of browser history vanished. This is unfortunate since it included research. The browser history of these approx. 4 days were visible in the sidebar window during the recent session, however when the computer was restarted the recent 4 days were completely gone. I've already tried to sort this out, but unsuccessfully so now I'm asking: Any ideas how/why this would happen and what can be done to recover this lost history? Any thoughts are greatly appreciated.