Re: Firefox dropped all my bookmarks!!
^ What he said.
(Please read my whole post as I have newer info near the bottom)
I've never seen it lose bookmarks. You should at least be able to import them from IE like he said.
Or....
Firefox's bookmarks live in:
C:\Documents and Settings\<your name>\Application Data\Mozilla\Firefox\Profiles\<random characters>.default\bookmarks.html
Double-click that file. It should contain your bookmarks. If not, rename it to bookmarks.html.bak. Now, you'll see a file called bookmarks.bak. That's a backup automagically created by firefox. Rename that to bookmarks.html. Again, double-click it and see if your bookmarks are in it. If so, your bokmarks in Firefox should be fixed. If not, you may need to import from IE.
There's also a bookmarksbackups folder in that same location. I don't recognize the file extension used there, but there may also be a way to restore those. Ok, just figured that out. This must be new for Firefox 3. Anyway, open Firefox and from the menu up top, go to Bookmarks -> Organize Bookmarks. There you'll see the Import and Backup button. There will be several automatic backups to restore from.
Good luck!