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.

You lost your bookmarks? Was any other saved data affected, such as saved logins, add-ons, custom settings?

Have you been working through this article: Recover lost or missing Bookmarks

I tried several of the solutions from the Support community. The last one I tried gave me a new icon shown as "Other Bookmarks" which shows up just under the icons on the top right of the screen. When I clicked on that, I did access my bookmark folders, but each of the folders is empty. So none of my bookmarks is available to me and I had lots of them. Any other suggestions will be appreciated. Thanks.

Note that the Library handles bookmarks and history and downloads, so do not get confused. Note that Firefox 85+ shows an Other Bookmarks button at the right end of the Bookmarks Toolbar.

Do you see the bookmarks in the sidebar (Ctrl+B) ?

If you use Sync then best is to disconnect Sync temporarily during troubleshooting.

This can be caused by a problem with the places.sqlite and favicons.sqlite databases in the Firefox profile folder.

• use "Verify Integrity" button on the "Help -> Troubleshooting Information" (about:support) page

If errors are reported with "Verify Integrity", close and restart Firefox or reboot and retry.

If "Verify Integrity" cannot repair places.sqlite, rename/remove all places.sqlite and favicons.sqlite files in the Firefox profile folder with Firefox closed. Firefox will rebuild places.sqlite and restore the bookmarks from a recent JSON backup in the bookmarkbackups folder.

• keep a backup copy of places.sqlite in case a new places.sqlite database has to be created

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

You can use the button on the "Help -> Troubleshooting Information" (about:support) page to go to the current Firefox profile folder or use the about:profiles page.

• Help -> Troubleshooting Information -> Profile Folder/Directory:
  Windows: Open Folder; Linux: Open Directory; Mac: Show in Finder
• https://support.mozilla.org/en-US/kb/profiles-where-firefox-stores-user-data

Thanks to all of you who tried to help. I did a refresh of Firefox and that cured the problem.