Copy this about:preferences#sync and paste it into the URL bar, then hit Enter.

Gimply said

How do I access options so that I can adjust my sync settings? I have Windows 10.

According to your system details you posted this using Chrome, and not Firefox ...... (?)

You won't get to Firefox's Options or about:preferences#sync using Chrome .....

See also:

• https://support.mozilla.org/en-US/kb/how-do-i-set-sync-my-computer
• https://support.mozilla.org/en-US/kb/how-do-i-choose-what-types-information-sync-firefox

• https://support.mozilla.org/en-US/kb/firefox-sync-troubleshooting-and-tips

Note that you can click the email address in the "3-bar" Firefox menu button drop-down list to access the Sync settings (Options/Preferences -> Firefox Account) in the current Firefox release.