Okay, I found a way. Here's what I did. I've got a win7 machine. I went to C:\Users\putyournamehere\AppData\Roaming\Mozilla\Firefox\Profiles There were 3 profiles. The newest one from 6/21 (today), 1 from 6/5/19 and an older one. I opened up the newest profile for me, Opened "bookmarksbackup" and cut the bookmarks file and pasted it on my desktop so I wouldn't lose it. Then I went into the 6/5 profile/bookmarksbackup folder and copied the latest bookmark file from there. I then went back into the bookmarksbackup folder for the 6/21 profile and pasted the 6/5 bookmarks in there.

I did all this with Firefox closed and when I opened it I got my bookmarks back!

I hope this helps someone. I'm not really a computer whiz so if someone else has a better suggestion or just a better way to word this solution that would be great. Thanks!

If you lost personal data then it is possible that a new default-release profile folder has been created.

See "Determine if Firefox has created a new profile":

• https://support.mozilla.org/en-US/kb/recover-lost-or-missing-bookmarks

You can open the about:profiles page via the location bar to check whether multiple profiles are present and what profile Firefox currently is using.

• Do NOT click any Remove button on this page.
• https://support.mozilla.org/en-US/kb/profile-manager-create-and-remove-firefox-profiles

Firefox 67 and later can use a dedicated profile for each of the Firefox update channels and will lock the profile, so it can only be used by Firefox in a specific installation folder. For Release versions this profile would be a xxxxxxxx.default-release profile, profiles used in older Firefox versions usually used a xxxxxxxx.default profile (a refresh adds a time stamp).

• https://support.mozilla.org/en-US/kb/dedicated-profiles-firefox-installation

https://hacks.mozilla.org/2019/05/firefox-67-dark-mode-css-webrender/

• https://blog.nightly.mozilla.org/2019/01/14/moving-to-a-profile-per-install-architecture/