Please update to 59.0.2 https://support.mozilla.org/en/kb/update-firefox-latest-version

Are the bookmarks and Profile the same on each computer ?

As the easiest way would be to copy your Profile out of the other system and stick it in this one with the problems. https://support.mozilla.org/en-US/kb/profiles-where-firefox-stores-user-data copy to USB then make a copy of corrupt profile then insert Profile with same Folder name. ( I think) Or it is a matter of deconstructing your profile folder. Create a new profile as a TEST to check if your current profile is causing the problem.

• https://support.mozilla.org/en-US/kb/profiles-where-firefox-stores-user-data
• https://support.mozilla.org/kb/profile-manager-create-and-remove-firefox-profiles
• http://kb.mozillazine.org/Standard_diagnostic_-_Firefox#Profile_issues

If the new profile works then you can transfer files from a previously used profile to the new profile, but be cautious not to copy corrupted files to avoid carrying over the problem. Never work with original files.

• https://support.mozilla.org/en-US/kb/recovering-important-data-from-an-old-profile
• http://kb.mozillazine.org/Transferring_data_to_a_new_profile_-_Firefox

Please let us know if this solved your issue or if need further assistance.

Thank you! I did update Firefox from 51 to 52. I'm using a new laptop so it's a new profile with new bookmarks. The update didn't change anything. I wonder if I should reinstall Firefox, but I'd hate to lose my bookmarks. Instead of using Bookmarks Menu, I tried a new folder in Bookmarks Other.....same thing, it closes as New Folder before I can name it. Ugh. Any other suggestions?

Hi, never loose anything if do this :

• https://support.mozilla.org/en-US/kb/back-and-restore-information-firefox-profiles
• https://support.mozilla.org/en-US/kb/export-firefox-bookmarks-to-backup-or-transfer

SO please tell me why I see that the question relates to ver 59.0.3 as shown here and you tell me you just updated from ver 51 to ver 52

Open this and look please and confirm what version your are running please, Thank You. https://support.mozilla.org/en/kb/update-firefox-latest-version

Are you using Sync?

This is a known issue when you use Sync.

My bad on the version! I was at 59.0.1 and updated to 59.0.2. I was trying to figure out how, after copying the Profile folder to a USB, how to replace the original and was getting confused......then I got your message re "sync".....good grief! I had forgotten I did try to sync but didn't think it worked. I followed instructions to delete the sync and the Bookmarks "new folder" problem has been SOLVED! You are a genius! Thank you EVER SO MUCH!