Windows doesn't have any program association for .json files, but Firefox still should be able to import them.

Try:

orange Firefox button > Bookmarks
or
Bookmarks menu > Show All Bookmarks

On the top bar, there should be three menus, Organize, Views, and Import and Backup. The third one is the one you want.

Import and Backup > Restore > Choose file

Does that work?

See also:

• http://kb.mozillazine.org/Backing_up_and_restoring_bookmarks_-_Firefox

That did help. Sincere thanks

It did help, sincere thanks