I recently moved my other PC to Windows 10, then put on Firefox (browser). When I drop down the menu below the address bar, I see random web sites I apparently have used -- not what I want to see. I want what my laptop (Firefox on Windows 10, also) shows which is a set of web sites that I visit often. That list is fixed and does not deviate. THAT is what I want for my the other PC with the new Windows 10 on it. What setting(s) in Firefox controls this? I have attached a screenshot of the preferred drop down menu that I cannot seem to duplicate on the new Windows 10.

Thanks to all in advance for whatever advice you might offer.