History-->Show all history-->Select the day or week or month

If you only see today's history and yesterday's history then older history has been deleted and is probably lost.
If you keep the history then older entries should reappear during the next days.

Note that with the Australis appearance you may have to look harder to see the history.
You can still press the F10 key or tap the Alt key to bring up the hidden Menu bar.

You can install the Classic Theme Restorer extension to restore some functionality that was lost with the arrival of the Australis code in Firefox 29.

• https://addons.mozilla.org/firefox/addon/classicthemerestorer/

• https://support.mozilla.org/kb/how-to-make-new-firefox-look-like-old-firefox
• https://support.mozilla.org/kb/common-questions-after-updating-to-new-firefox
• https://support.mozilla.org/kb/learn-more-about-the-design-of-new-firefox

I did not intentionally remove my history. I'll wait till tomorrow to see if a third day is added.

The only two options shown are today and yesterday. I'll wait 24 hours and see if a third day is added.

I have this problem, too. My History library now only shows Today and Yesterday, but the location bar can search more than 3 days ago. Also, typing history from 3+ days ago into the History library search bar doesn't bring up anything.