Actually, it still works the same way. It launches the Library window to the "Today" list for your history. You can access more entries by either

• choosing a date range in the left column
• typing some text to match in the tiny search box at the upper right

Are you seeing something different?

Thanks, but no. On the bottom it used to say all history - now it says manage history.

Yes, I see that, but when I click it, it performs the same action as "Show All History" in older versions of Firefox. What does yours do?

See below.

Hmm, looks like your older history got deleted. Were there any unusual events with your Firefox recently, like a Refresh/Tune-up or new profile created?

No. I understand why no older history. I downloaded Firefox latest and the all history disappeared. Prior to update, I had at bottom All history.

Your screenshot shows the Library window that was also opened previously when you clicked "Show All History" with the history selected and "Show All Bookmarks" with the bookmarks selected.

There is no article about the History Manager (Library), so you can possibly look at the atricle for the bookmarks.

• https://support.mozilla.org/en-US/kb/bookmarks-firefox