Hardening Firefox – a checklist for improved browser privacy

remember that "firefox -p" opens the profile manager so you can have one profile without the last two items on that list, just for when you need one or two sites that have broken login code that requires 3rd party cookie (it's always for malicious reasons rather than incompetence, but if you have to login you have to login)

Hypersegregate browsing with profiles.

One profile for banks, a different profile for Amazon, a third profile for Google sites, a fourth for news sites I log into, a fifth for news sites I don't log into, a sixth that automatically forgets everything on exit for sites that UBO breaks.

Then delete all data on each profile periodically, weekly for news sites, monthly for Amazon and banking sites.

It's a giant pain in the ass juggling all these profiles. Seems like there should be a browser that automatically and transparently isolates every site in its own profile.

Mozilla introduced new profile manager for Firefox somewhere around May. This thing uses new storage format and ignores already existing "old" profiles, except for the default one. Data remains untouched, profiles created in the past are still here accessible by about:profile and if you don't want to use that new profile manager set browser.profiles.enabled entry to false.

From what I've seen around people using the popular customized Firefox variants, like Floorp, Librewolf were surprised by this and not fond of the change.