Firefox didn't restore my session

Yesterday (12/29/11), my browser was working perfectly fine- it was restoring my session. However, when I started it up today, it did not. Please tell me it's possible for me to restore my session. I've dealt with this before (when my settings didn't say to restore my tabs), but, it's been working fine since. I had 2 windows open (I don't know how many tabs I had- I know it was a lot). Is there a way to restore my session by opening my "containing folder" in the "troubleshooting" area? Please help. I'm desperate here. I really don't want to have to go through this again. Thanks.