Start Firefox in Safe Mode {web Link} by holding down the <Shift>
(Mac=Options) key, and then starting Firefox. A small dialog should appear. Click Start In Safe Mode (not Refresh).

Is the problem still there?

While still in Safe Mode,

In the address bar, type about:crashes<enter>. Note: If any reports do not have BP in front of the numbers/letters, click it to submit them.

The crash report is several pages of data. We need the report numbers to see the whole report.

Using your mouse, mark the most resent 7 - 10 crash reports, and copy them. Now go to the reply box below and paste them in.

(Please don't take a screenshot of your crashes, just copy and paste the IDs. The below image is just an example of what your Firefox screen should look like.)

Look on your desktop. Do you see a folder called; Old Firefox?

https://support.mozilla.org/en-US/kb/recovering-important-data-from-an-old-profile

https://support.mozilla.org/en-US/kb/back-and-restore-information-firefox-profiles

Tried to send recent crash data but mail was not delivered. Tried Old Firefox folder with no results. Also tried to open Firefox in safe mode, also no help. Still have lost all of my bookmarks. Any assistance will be greatly appreciated. thank you.

frustrated14218 said

Tried Old Firefox folder with no results.

What do you mean? Were there any folders/files there?

3 folders, 2 of them dated 10/11/16 & 1 of them dated 10/13/16. Please excuse me as I am not the most tech savvy person, am trying to follow as best I can.

Check out the 10/13/16 folder, look at the file sizes. If it looks okay, use it. If not, go on to another folder.

Folders are as follows: 10/11 - 49.4 mb 10/13 - 25.0 mb 10/11 - 17.0 mb

I am slightly confused. When I open the firefox profile folder, do I then paste the folder from the desktop into that folder ?

No. Select a folder. Then Copy the chosen files to the current profile, overwriting the current files.

Tried all 3 folders, no luck. No bookmarks have returned, just shows from time firefox disappeared. Am turning in for tonight. Thank you for your efforts. If you have any other thoughts, would like to hear them. Again, thanks and good night.

I've called for more help.

This morning I sat down and just started to open any folder that I could find in firefox. Took me about an hour and a half of going through folders, but somehow I managed to restore the bookmarks in firefox. I have no clue as to how it happened, but I am thankful that it did. Thanks for your efforts. Just wanted to touch base and let you know.

That was very good work. Well done. Please flag your last post as Solved Problem so others will know.

These add-ons can be a great help by backing up and restoring Firefox

FEBE (Firefox Environment Backup Extension) {web link} FEBE allows you to quickly and easily backup your Firefox extensions, history, passwords, and more. In fact, it goes beyond just backing up -- It will actually rebuild your saved files individually into installable .xpi files. It will also make backups of files that you choose.

OPIE {web link} Import/Export extension preferences