I feel your pain. This just happened to me last night. After I freaked out, I came to terms with it, and even after spending more time this morning searching for a fix, I'm coming to terms with having to manually bring back each one from mobile FF (I didn't have my phone synced so bookmarks are still in tact there). Until now I thought Mozilla was at the top as far as a browser, but this is unacceptable. I realize now how heavily I rely on my bookmarks daily for work and school, so not only am I going to set bookmark backup reminders, I'm going to have to use a different default browser. Sad! I'm going to try Arc.
