You should always configure your browser to automatically wipe all data on exit. The Arkenfox user.js user profile does this and more to mitigate fingerprinting.
Would be nice if there was some other solution, like maybe encrypting the browser profile and then requiring a pin/password/biometric/something to unlock it on each start.
Many sites I use force email or SMS-based 2FA, sometimes in addition to "security questions" and/or have other multiple steps of authorization (like captchas) required; it's often not just a simple username/password for me.
Now multiply that by 25 different sites. Not happening.