"Multi-Account Containers Add-on Sync Feature"

I’ve been using multi-account containers, including the Facebook-specific one, for some time now, and love the feature. I’ve got separate work and banking containers, for instance, so cookies and other storage are sandboxed in those logical areas, kind of like having separate browsers for those purposes. Having the settings sync among Firefox installations is a no-brainer, and I’m glad to see the feature.