That's just painful.

Give this a try, I think this will solve your problem. Bookmarks Duplicate Remover

Clicked them all one by one and they were gone ! Thanks

Sajjad Bin Samad said

That's just painful. Give this a try, I think this will solve your problem. Bookmarks Duplicate Remover

I've used the above addon 3-4x & the bookmarks still return, both randomly on bookmarks drop-down menu & within the many folders I have. I have too many bookmarks to write down & reenter. There's got to be an effective permanent solution out there somewhere!

Sorry to hear that. I think that's because maybe you have had created the same bookmarks many times and synced them with firefox account.

First, disable "bookmarks sync"Goto: Options > Firefox Account then try the addon.

Try what extension? I don't understand the concept of creating the same bookmarks many times & syncing them with the Firefox account. I don't know how or why I'd do that! How do you sync bookmarks you've created in Firefox to a Firefox account?

Sorry for the confusion.

Try this addon

• Bookmarks Organizer

Hope that helps.

Another problem I forgot to mention above is that as of yesterday all these duplicates appared in my iphone 6s Safari browser as well. That has never happened before & it will take forever to delete each one. I had not done anything about deleting laptop bookmarks & don't understand how they were synced to my phone! The previous day had deleted all but favourite bookmarks from my phone as I had planned to import all of the folders from my laptop once I had the dupe problem fixed.

For more info about sync read these article

• How do I set up Sync on my computer?
• How do I choose what information to sync on Firefox?

I installed Bookmarks Organizer & checked for duplicates; 2147 with 247 errors. Big deal...there's no menu on what to do next except go through pages & pages of bookmarks & manually delete the duplicates. I went through using the addon Bookmark Dupes 3-4x & got nowhere. I'm so done with this s..t & not getting a solution from anyone/where I look for assistance!!!!

Note that Firefox keeps some rotating backups in the bookmarkbackups folder. The name of an automatically created JSON bookmarks backup in the bookmarkbackups folder includes a total item count (folders and separators included) and an hash value to prevent saving the same backup more than once. You also see this count in the Restore menu drop-down list.

• bookmarks-YYYY-MM-DD_<item count>_<hash>.jsonlz4.

So you can check for unusual changes in the items count.

Such issues can also be a problem with the places.sqlite database.

You can check for problems with the places.sqlite database (bookmarks and history) in the Firefox profile folder.

• use "Verify Integrity" button on the "Help -> Troubleshooting Information" (about:support) page
  in case errors are reported close and restart Firefox and retry

See also:

• https://support.mozilla.org/en-US/kb/Bookmarks+not+saved
• https://support.mozilla.org/en-US/kb/fix-bookmarks-and-history-will-not-be-functional