Gregory's Server@noellemitchell @miclgael My understanding is that #Firefox now protects you (like the container did) by default. Enhanced Tracking Protection is turned on by default. https://developer.mozilla.org/en-US/docs/Web/Privacy/State_Partitioning
However... there may be non-tracking issues it can't remedy, like keylogging. When you interact with a website (really use it) you have to trust it. If that site adds a 3rd-party keylogger then they have a deal to share your data with "partners" anyway. The EU has laws against this but we don't.
@noellemitchell @miclgael The "loads in special Facebook browser" is probably a practice that Apple and Android could force them to stop. They already place strong restrictions on anything considered to be a 3rd party web browser.