Firefox Containers allows users to separate cookie jars for their professional and personal online identities on any site

Firefox added a container feature to its nightly build, that makes sure that sites do not pull unwanted data from their browsing activities. When a user is searching on the web, the browsing activity is tracked by a number of web sites through third parties, and these are consolidated to change the experience for the user. For example, if you are shopping from your office computer, the ads shown while browsing sites will change to reflect your previous shopping searches. If you have to watch a video while logged into a work related shared account, then your viewing habits will change the YouTube experience for everyone sharing that account. A work around is to log out before watching, and log in again after watching, but that can be cumbersome.  Everyone in real life approaches conversations with friends, family and co-workers differently, and Firefox wants to bring this functionality in digital experiences as well. The Containers feature allows the browser to sandbox sessions, by separating the cookie jars. This means that each container will have different cookies, indexeddb, localStorage and caches. These are called contextual identities, and there are contextual identities available for work, personal, banking and shopping experiences. Users can access these containers by opening a New Container Tab in the File menu. The containers are colour coded, blue is for personal, yellow is for work, green is for banking, and red is for shopping. The containers feature does not affect the normal browsing experience, or the regular new tabs without any colour codes.