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How do I merge a backup of my bookmarks with my current version?

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I would like to merge a backup of my Bookmarks with the current version of bookmarks on my computer. How do I do that?

I would like to merge a backup of my Bookmarks with the current version of bookmarks on my computer. How do I do that?

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In Firefox the bookmark backup files are in JSON format, which doesn't allow that backup file to be merged with existing bookmarks.

Restoring a backup would overwrite your existing bookmarks. But if you would export your existing bookmarks in HTML format, you could import that HTML file to append / merge after restoring the backup.

https://support.mozilla.org/en-US/kb/export-firefox-bookmarks-to-backup-or-transfer

https://support.mozilla.org/en-US/kb/restore-bookmarks-from-backup-or-move-them#w_restoring-from-backups