Forum der Gemeinschaft Firefox

MacOS Sequoia 15.7.7; Firefox 141.0.2

The "one sentence" in the heading states the problem. I am unable to use Firefox. Using Safari to make this post.

Firefox loads. It opens windows (I had fourteen open when I last used it successfully; I have many, many tabs). Then it removes each window from the screen. Firefox is in the Menu bar, but no windows are displayed. The windows still show in the list when selecting Window in the menu bar. Selecting a window in that list has no visible effect. File>New Window opens a new window, which works as expected. With one new window open, File>New Window opens a second.

Typing a few characters in the address bar opens a dropdown with a list of tabs, each with the affordance, Switch to Tab. Clicking on one takes down the list but does not open a window.

I would like, for a start, instructions on how to use Firefox starting afresh with no windows. First: having set aside the data that causes this problem. I suppose that might be simply a new profile. But would like instructions from a person interested in pursuing the problem with me while I continue with the rest of my life.

I'm willing to delete some data from the failing profile, is there is reason to do that, but would like to preserve at least a list of the URLs of the tabs of the windows. Or to learn how to see those in the profile data.

I see four profiles:

  <garble>.default-<13 digit integer>  Date Modified: Today  2.2 GB
  <garble>.Default Profile   Date Modified: Last June   24.6 MB
  <garble>.default-release-1   Date Modified: Last June, five minutes later  93.2 MB
  <shorter garble>.default-release   Date Modified: 2021   13.4 MB

Thanks in advance.

Since updating Firefox on June 30, 2025 on my Dell desktop computer that runs Windows 10, most of my bookmarks are no longer visible. Only four of my bookmark folders are visible and most of their contents have disappeared.

However, 1) my uncategorized bookmarks - those in "other bookmarks" are still visible, and 2) If I go to "Manage bookmarks" and do a search, I can find all of my bookmarks including those that are no longer visible.

In addition, I can no longer add or delete bookmarks. It looks like I can do add a bookmark and it will let me go through the steps of adding a book mark - it even says I can put it in all my old folders that are otherwise no longer visible. But one I complete the process the bookmark does not show up.

I have read multiple Firefox Help articles about disappearing bookmarks and have taken all the steps suggested including: - Attempted to restore backups of bookmarks - didn't work. It shows me the multiple old backups but when I try to restore one I get the message "Unable to process the backup file". I have tried it with at least four of the old backup files - all without success. - cleared cache - did troubleshooting mode - refreshed Firefox - uninstalled and reinstalled Firefox - looked to see if I had a different profile other than my default profile that I could switch to. I do not see another profile.

Nothing has helped. Any suggestions would be greatly appreciated.

Thanks

I just transferred my data from an old computer with Windows 10 and now have Windows 11 on my new computer with a new version of firefox as my browser. How do I restore my bookmarks?