[pcthrowaway]

You can request your Chrome history from Google Takeout; I don't see how this is possible if they don't have access to your browser history.

Edit: it looks like e2ee is an option, though it's not the default, and Google goes out of their way to make this inconvenient for users: https://palant.info/2023/08/29/chrome-sync-privacy-is-still-...

But unless you're able to ensure that all users of your cryptpad documents have e2ee configured with a strong password, it's likely that Google will see the URLs with decryption keys to your cryptpad docs. It only takes one weak link...