I believe the parent comment is referring to multi-account-containers [1], which is a general implementation.
This Facebook extension is a reactionary Facebook-specific adaptation of that extension. But it is still useful for many users since it doesn't require any user interaction.
I think multi-account-containers is more convenient than profiles since it provides a single interface to manage the containers and browser settings are shared, but I am actually using profiles on Firefox because the extension doesn't seem to support the "Never remember history" browser option.
This Facebook extension is a reactionary Facebook-specific adaptation of that extension. But it is still useful for many users since it doesn't require any user interaction.
I think multi-account-containers is more convenient than profiles since it provides a single interface to manage the containers and browser settings are shared, but I am actually using profiles on Firefox because the extension doesn't seem to support the "Never remember history" browser option.
[1] https://github.com/mozilla/multi-account-containers and https://addons.mozilla.org/en-US/firefox/addon/multi-account...