Sorry to hear about this problem.

As the first step, if you haven't already, could you close out of Firefox and do a normal shutdown and restart of Windows to clear file locks and complete any pending updates.

Then, if problems continue, could you check whether your stuff is available in a different profile, as follows:

Profile Manager Page

Inside Firefox, type or paste about:profiles in the address bar and press Enter/Return to load it.

This page should list at least one profile and could list many. (Each profile has two folders and one or more buttons. Do not use any Remove buttons!)

The profile that Firefox is currently using will have this:

This is the profile in use and it cannot be deleted.

Do you have any other profile(s) listed on this page? If so, you can check whether it is the one you were using recently by clicking its Launch profile in new browser button.

If it isn't what you want, simply close that new window.

If it IS what you want, back on the about:profiles page, click the Set as default profile button for that profile so Firefox uses it automatically at the next startup.

Any progress so far, or do we need to keep looking for your data in some other places?

Did you install an earlier Firefox version as that may have caused Firefox to create a new profile?

The System Details show you run an older Firefox 120.0 version that is no longer supported with security updates.

Could you please update to the current Firefox 124.0.1 release.

• https://support.mozilla.org/en-US/kb/update-firefox-latest-release
• Help -> About Firefox