hii agoretsky,

If you were using Sync before and haven't reset the Firefox Account password then you might be able to retrieve the bookmarks. Otherwise you would need a backup, either a JSON backup in the bookmarkbackups folder in the profile folder that Firefox creates automatically or an HTML backup that you have created yourself or a backup copy of places.sqlite. If you do not have either then your bookmarks are likely lost.

[https://support.mozilla.org/en-US/kb/recovering-important-data-from-an-ol...]

[https://support.mozilla.org/en-US/kb/restore-bookmarks-from-backup-or-mov...]

if your problem is fixed please response me.

Thanks Regards -Arman

We had a operating system update that lost all of our bookmarks.

What about the rest of your profile? Settings, bookmarks, history, passwords . . . .

Restore Bookmark Backups

Firefox automatically makes backups of the bookmarks. These are stored in the bookmarkbackups folder.

Open the Bookmarks Manager; Press the Alt or F10 key to bring up the toolbar, and select Bookmarks. Hot key is <Control> (Mac=<Command>) <Shift> B. Firefox 84+ <Control> (Mac=<Command>) <Shift> O.

Once the window is open, at the top of the page, press the button labeled Import and Backup. Select Restore. From the list, pick the file you want and click it.

The backups are stored in a jsonlz4 file named something like this; bookmarks-2016-06-29_1424_enD1GTH ya0JmicnYWg4V4g==.jsonlz4

In this example; 2016-06-29 = date created, 1424 = number of entries.

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

https://support.mozilla.org/en-US/kb/recover-lost-or-missing-bookmarks

https://support.mozilla.org/kb/forum-response-recover-bookmarks-after-update