Hi jerryferreira,
Sorry I have tried to answer your question, but I am not sure I understand what you are doing or seeing.

Apparently you have Firefox installed on a PC, so either a desktop or laptop presumably.

When you open the Firefox bookmarks library and export bookmarks that should export all your bookmarks to the chosen location as HTML. Although Firefox normally backs up using .JSON .

• CARE .json backups overwrite and destroy existing bookmarks when restored.
  • You should always make manual backups before attempting any restore
    See Restore bookmarks from backup or move them to another computer_manual-backup
  • HTML type will export and when imported are appended or tacked-on to existing bookmarks.
    Export Firefox bookmarks to an HTML file to back up or transfer bookmarks
    Import Bookmarks from an HTML file

You may consider using Firefox Sync. But take care it is the backups on the devices that you create that are the backups, NOT anything on the sync server. (IIRC this system is no longer being developed, and may be replaced at a future date)

• How do I set up Sync on my computer?
• I've lost my Firefox Sync account information - What to do CARE not to lose the key
• Use Sync to share your Firefox bookmarks, passwords and more with Firefox for mobile

As you stated, "When you open the Firefox bookmarks library and export bookmarks that should export all your bookmarks to the chosen location as HTML." I agree with you, but that's not what's happening.

Attached is a screen capture of my bookmarks. As you can see, my bookmarks are in a folder called Mobile Bookmarks. I already am using Sync. What you see are the synced bookmarks when I synced my Firefox for PC and Firefox for Android. That is working perfectly.

I want to export these bookmarks so that I can import them to Google Chrome.

When I export from Firefox for PC, the created html file does NOT contain the Mobile Bookmarks. It only contains the few bookmarks that I have in the Bookmarks Toolbar.

Hi jerryferreira, did Sync create that Mobile Bookmarks folder? Since it is not within the 3 standard containers, I think you might need to copy it onto the Bookmarks Menu. Obviously this creates the danger of duplication as long as Sync is active. Not sure what to suggest to avoid that.

Ahhh! Thank you! Yes, Sync did create that folder. I will copy my bookmarks to one of the 3 standard containers, then export, then delete the copies of my bookmarks.

Again, thanks!!!

Jerry