Every time I open a New Tab, I have to re-sign into some websites - AKA: some websites will not keep me logged in across multiple tabs. This includes some of my online banking websites (which then need 2FA immediately to get into again), Apple-related accounts (same 2FA issue, my accounts/devices always appear like I'm signing into a brand new devices/browsers every time), some Amazon-related accounts, some blogs, and various other websites/hosts, like WikiDot pages, Ao3, and others, etc.

How can I "approve/OK" the sites that I frequent/are favorites, for this browser, on this computer, so I will remain logged in (for however long is possible)?