Is it problem with Firefox for Android or Desktop Firefox?

Проблема с компьютером

I think posting in EN on a EN help forum would help others understand the problem.

Are there any backups in the bookmarkbackups folder available? *Bookmarks -> Show All Bookmarks -> Import & Backup -> Restore *https://support.mozilla.org/kb/restore-bookmarks-from-backup-or-move-them You can check if you have an "Old Firefox Data" folder on the desktop in case the Refresh feature in Firefox has been used and a new profile has been created. *https://support.mozilla.org/en-US/kb/reset-firefox-easily-fix-most-problems If you have the "Old Firefox Data" folder on the desktop then try to restore the bookmarks from a compressed .jsonlz4 backup in the bookmarkbackups folder like I posted earlier in the reply. If there are problems with restoring a backup then you can check for problems with the <b>places.sqlite</b> database (bookmarks and history) in the Firefox profile folder. *use "Verify Integrity" button on the "Help -> Troubleshooting Information" (about:support) page<br>in case errors are reported close and restart Firefox and retry See also: *https://support.mozilla.org/en-US/kb/Bookmarks+not+saved#w_fix-the-bookmarks-file *https://support.mozilla.org/en-US/kb/fix-bookmarks-and-history-will-not-be-functional