I use Firefox as my browser. My privacy settings are strict. I block
- All third-party cookies, and always delete all cookies when Firefox is closed.
- Tracking content (in all windows);
- Cryptominers; and
I never log in to sites such as Google, Facebook and such (I don't even have an account) and never click advertisements (I block them with Ublock Origin).
As far as I know, the only information I am giving away is my device's IP address. However, that IP address is not unique, it is shared among some thousands of devices that my ISP serves.
Now, I guess that is an overly optimistic reasoning and that I must be missing something, so I ask: Assuming the ISP refuses to collaborate with them, could tracking companies still identify and profile me? How so?
I have read this related question but it does not answer my main question.