How can I restore my Mozilla Firefox bookmarks with a backup with an extension of json?

I am having trouble restoring my bookmarks. I created a backup and the file has an extension of (json) however I cannot restore my book marks I get an error message that reads (Unable to process the backup file) please help

Mozilla Knowledge Base: Unable to process the backup file - Firefox ------> http://kb.mozillazine.org/Unable_to_process_the_backup_file_-_Firefox

Mozilla KB: Lost Bookmarks -----> http://kb.mozillazine.org/Lost_bookmarks

Some possible solutions are @ the above links. If you are still experiencing the error, try posting your problem @ the forum below.

MozillaZine Forums ----> http://forums.mozillazine.org/index.php?sid=cf23f2e5f6ad3742fc67e9acc1abf6cd