Import bookmark from SeaMonkey to FireFox

I changed my web browser from lovely SeaMonkey to FireFox. The versions are:

• SeaMonkey: Ver. 2.31
• FireFox: Ver. 34.0

Specifically, I used bookmarkbackup since SeaMonkey and FireFox use same format for bookmark backup.

1. Copy latest bookmark backup from /.mozilla/seamonkey/***/bookmarkbackups/ to /.mozilla/firefox/***/bookmarkbackups/ (the file name is bookmarks-2014-12-27_689_g4xD2D4573V64kdjAYCkGQ==.jsonlz4 in my case)
2. reboot FireFox
3. Bookmarks -> Show All Bookmarks -> Import and Backup -> Restore and then select the latest bookmark backup