No, Mozilla doesn't log the websites that are visited by people who use Firefox, that would be a massive invasion of privacy.

I can suggest a few things:

• Make sure that Firefox and your computer are completely up to date to eliminate any known security threats.
• Download Malwarebytes (www.malwarebytes.com) and run a scan to find any malware on your computer.
• Use our breached accounts tool, https://monitor.firefox.com/ to see if your e-mail address was involved in any data breaches, and change your password if it was.

I hope this helps!

Note that you should immediately change all involved passwords.

See also Firefox Monitor.

• https://support.mozilla.org/en-US/kb/firefox-monitor
• https://support.mozilla.org/en-US/kb/firefox-monitor-faq
• https://blog.mozilla.org/firefox/firefox-monitor-take-control-of-your-data/
• https://monitor.firefox.com/security-tips

If you still have history from around that time available then you can use this utility if that is what you are after. Firefox only show the most recent visit of a web page.

• http://www.nirsoft.net/utils/browsing_history_view.html