This tutorial explains how to import and export the history of Mozilla Firefox web browser.
Exporting and importing history is useful for transferring history from one computer to another within the Firefox family of browsers.
To export history, install the History Export addon from addons.mozilla.org, access the Preferences, and click on Export History.
To import history, make sure the History Export addon is installed, access the Preferences, click on Browse, select the history file (firefox-history.json), and click Open.