Sync passwords in Chrome - but not any other data

How can you set Chrome to sync passwords to Google Account - but not any other data? Chrome is designed to send full browser history to Google, for ad-tracking purposes. What's the full list of things to make sure are turned off, after signing in to Chrome with my Google Account? --- I'm setting up a new device (Pixel 9 with Android 16). It comes with Google Password Manager. Sadly, Chrome uses its own autofill code. When Chrome offers to save something in Google Password Manager, it does _not_ look the same as in any other app. => If I _don't_ sign in to Chrome, I will have two separate password managers: 1. System-level autofill with Google Password Manager - which can only save passwords in your Google Account. 2. If you don't sign in to Chrome using your Google account, then Chrome can only save passwords "on this device". I use Firefox as my web browser. But I'm used to keeping the original browser as a backup (or keeping Chrome on Linux). I need to be able to check whether a website has decided to hate Firefox, or whether it's broken for everyone. It might sound picky, but I don't want my backup browser to use a separate "on my device" section in Google Password Manager. It's too much confusion. I want to have a good setup, that I can recommend to other people.