Don't know which websites you visit, but if they have a "Remember me" box, you might want to check that. I have to log in here on the 'Fire once every 30 days, and that's true on most of the places I visit. Many others don't ever require sign-in.
If you are worried about tracking, consider using a more secure browser like Brave. (I disable the rewards and wallet options on Brave, so can you.) Brave does not track your browsing history, and it has both a private window (which erases your browsing history when you close Brave) and TOR, which is a free VPN that hides who you are. Brave has many other nice features and is lightning fast.
