''semyonova [[#question-1233940|said]]'' <blockquote> all my bookmarks disappeared in August, the reasons are not clear </blockquote> This doesn't give us or anyone reading much to go on?

Do you still have backups in the bookmarkbackups folder? *Bookmarks -> Show All Bookmarks -> Import & Backup -> Restore *https://support.mozilla.org/kb/restore-bookmarks-from-backup-or-move-them You can check for problems with the <b>places.sqlite</b> database (bookmarks and history) in the Firefox profile folder. *use "Verify Integrity" 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 ---- 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 *https://support.mozilla.org/en-US/kb/recovering-important-data-from-an-old-profile