Containers is a feature that lets you separate your work, shopping or personal browsing without having to clear your history, log in and out, or use multiple browsers.

Container tabs are like normal tabs except the sites you visit will have access to a separate slice of the browser's storage. This means your site preferences, logged in sessions, and advertising tracking data won't carry over to the new container. Likewise, any browsing you do within the new container will not affect your logged in sessions, or tracking data of your other containers.

You can use Firefox Containers by installing this extension written by Mozilla.

What you can do with Containers

1. Log in to multiple accounts on a single website at the same time. For example, if you have a personal Gmail account and a work Gmail account, you can log in to both accounts in separate containers.
2. Protect yourself against tracking without having to log out of websites while you browse. Websites in one container can't track your activity in other containers.
3. Protection against Web security attacks. Any harmful clicks will be kept within that website's container, so attackers won't be able to hijack your information in other containers.

How to use Containers

Enable the Containers by downloading the extension from https://addons.mozilla.org/en-US/fire.../multi-account-containers/.

You can open new Container tabs and each one will keep separate browser storage (such as cookies or localStorage) from other Containers. Your normal tabs are the default container and will still look and act as you'd expect them to before enabling containers.

Open Containers

Look for the Containers icon:

Click it and select the container you want to open.

How to add, remove or edit Containers

Type in about:preferences#containers in the Firefox address bar. You'll see a list of default containers and options to edit, remove or add new containers.

Note that Containers is disabled in Private Browsing and when Never Remember History is selected in your privacy preferences.

Open links in new tabs and containers

You can open links in a new and/or different container. Right-click on any link, select Open link in New Container Tab, and then select the desired container tab.Hold the control keyCommand key while clicking a link to open it in a new tab. The new tab will open within the same container as the previous tab. This includes both the default container and in any of the predefined containers.