I think you want to use profiles, not myltiple binaries. Just lauch with "--no-remote --profile-manager"

https://support.mozilla.org/en-US/kb/profile-manager-create-remove-switch-firefox-profiles

There was a video essay going viral about this some time ago.

https://youtu.be/VYJtb2YXae8

I'm impressed that would be only a year. I have so many debt I thought it would be 3 to 5 years.

What "atribute detail colluns" do you need? Dolphin have so many of them I barely use.

first facebook enforces uses of real names and linking accounts to phone numbers, latter says scrapping is not their problem.

If they don't force the users to share their personal information, scrapping would not be the big problem they face now.