You can custom edit your history settings in the privacy tab from the options window.

In top left click Firefox > Options, click on the privacy tab. Reference the following article which explains how & where to load/use custom history settings, you'll want to scroll down halfway in the article to the History section & then locate where it tells you how to use 'Custom Settings for Firefox History"

See:

Settings for privacy, browsing history and do-not-track

1. Click on the Firefox button
2. Go over to History and select "Show all History"
3. The Library window will open
4. Click the triangle dropdown next to history on the left hand side to select the range you'd like to view.