What it means
A Firefox container isolates cookies, logins and site data among tabs within one profile. A separate browser profile also separates broader data such as add-ons and settings. Containers are convenient for two accounts on one service, while a policy-bound work identity may require a whole profile or managed browser.
A real-world example
A person reads mail from work and home in two colored container tabs, but both tabs still run in the same installed browser with its shared extensions.
What to do
Use distinct labels and confirm the account displayed before sharing or publishing. Choose a separate managed profile when your workplace requires separation beyond cookies.
The distinction that matters
Containers do not hide the IP address or erase the computer's characteristics. They also are not the same as Private Browsing; Mozilla notes containers can be unavailable in private windows. Decide which boundary your task actually needs.
Mozilla container scope
