Hi movision,

Sorry you are having problems with lost bookmarks. I note you had problems last year /questions/851481 and hopefully this time you will have been routinely making your own backups of bookmarks.

• see Restore bookmarks from backup or move them to another computer

So two steps

1. Immediately make a backup of your firefox profile
   (That ensures any auto bookmarks are preserved). IMPORTANT do this first, restoring bookmarks overwrites existing bookmarks. Put the restored files somewhere safe such as your Windows desktop.
2. Did you create any bookmark backups, if so the linked article above explains how to restore those bookmarks

You may also be interested in using Firefox sync, if you have a second device,as it allows you to sync bookmarks on the other device; and they are effectively then backed up.

• How do I set up Sync on my computer?

Problems with bookmarks and history not working properly can be caused by a corrupted places.sqlite database file.

You can check for problems with the places.sqlite database file in the Firefox Profile Folder.

• http://kb.mozillazine.org/Bookmarks_history_and_toolbar_buttons_not_working_-_Firefox
• https://support.mozilla.org/kb/Bookmarks+not+saved#w_fix-the-bookmarks-file

You can try to check and repair the places database with this extension:

• https://addons.mozilla.org/firefox/addon/places-maintenance/

You can check for problems caused by recent Flash updates and try these:

• disable a possible RealPlayer Browser Record Plugin extension for Firefox and update the RealPlayer if installed
• disable protected mode in Flash 11.3 and later
• disable hardware acceleration in the Flash plugin

• http://kb.mozillazine.org/Flash#Flash_Player_11.3_Protected_Mode_-_Windows