If you state what your final goal is, you will get better answers. You can get a somewhat clean list of sorted URLs from a JSON file with something like:

sed 's/,/

/g' bookmarks-2012-07-07.json | grep '"uri"' | grep http | cut -d '"' -f 4 | sort

Your most powerful option is to utilize sqlite3 to get the bookmarks from the file places.sqlite from your home directory.