Running the latest Firefox iteration on Mac, OS Sequoia 15.5. After the last recent update my bookmarks have vanished. I can only find a very outdated set related to an old profile (going back at least two years). There are no files anywhere in the library when I tried to follow instructions for restoration (most of which apply to Windows), and I can't find any backups. Is there a way of accessing and restoring the most recent backups or the original file in this situation?

NB is it possible that the update overwrote my profile with a new one? -- snapshot of the profiles on file attached. bit9ck45.default-release is the current profile; the other is the very outdated one.