They're probably making a conservative change that's easy to back out of, as a default, and then let various extensions experiment and discover how it should re

They're probably making a conservative change that's easy to back out of, as a default, and then let various extensions experiment and discover how it should really work. Personally I would want tabs to be in the bozo container by default, unless I explicitly grant the website access to a trusted container, or something. Extension makers will experiment and Firefox can choose from what gets learned.