firefox crashed and after restarted my comp and doing a restore everything was brought back except the bkmarks saved on firefox there any way for me to restore my saved bookmarks or are they now lost for good?

my firefox crashed...my comp was restarted...i had to do a system restore after which time everything returned to my computer with the exception of the bookmarks that i had saved while using firefox spanning over a years time. is there any possible way of retrieving the bookmarks that i had saved up until the moment it crashed(i'm assuming anything done then did not save), or are they lost for good?