How to backup/restore bookmark keywords?

[Foxinabox]

I tried creating a JSON backup of all bookmarks, and then restoring it, and Firefox lost many (but not all) the keywords I had defined for bookmarks (over 200 of them!).

How do you backup/restore bookmark keywords?

[Brummelchen]

sure you mean "keywords" and not "comments"?
JSON includes all keywords, and comments - but comments are no longer usable.
for the html file its "SHORTCUTURL", and ofc comments "<DD>"

[jscher2000]

I added the option to show keywords after their bookmarks to my converter (converts a .jsonlz4 backup file to an HTML file):

https://www.jeffersonscher.com/ffu/bookbackreader.html

[Foxinabox]

sure you mean "keywords" and not "comments"?
JSON includes all keywords, and comments - but comments are no longer usable.
for the html file its "SHORTCUTURL", and ofc comments

Yep, I mean "keywords".

Looking at the JSON export file, all the keywords are present. But during Firefox's import of that JSON file, only some of the keywords get imported with their respective bookmarks.