You can copy those files and others from the old profile to the new, with Firefox closed. https://support.mozilla.org/en-US/kb/recovering-important-data-from-an-old-profile https://support.mozilla.org/en-US/kb/profiles-where-firefox-stores-user-data#w_what-information-is-stored-in-my-profile https://support.mozilla.org/en-US/kb/profiles-where-firefox-stores-user-data#w_finding-your-profile-without-opening-firefox There is also the method described in the link below. https://support.mozilla.org/en-US/questions/1322197#answer-1384732

Thanks Terry.