Use Firefox Containers and live happy.
https://addons.mozilla.org/en-US/firefox/addon/multi-account...
If you want to be more aggressive, you can also toggle the configs privacy.resistFingerprinting and privacy.trackingprotection.enabled which will probably break some websites.
>> It's basic fingerprinting used by every major security-sensitive service, like banks.
>> The more entropy (unique bits of data) about your browser context they can collect, the easier to recognize you and see if you're a human or not (and block if they need to).