Mozilla has created the Facebook Container Extension It functions similarly to Mozilla’s Multi-Account Containers. The Facebook Container Extension was designed specifically to help Firefox users have more control of their data on Facebook.
The Facebook Container Extension helps people who are using Firefox to control more of their web activity from Facebook by isolating your identity into a separate container. Mozilla says this makes it harder for Facebook to track your activity on other websites via third-party cookies.
Rather than stop using a service you find valuable and miss out on those adorable photos of your nephew, we think you should have tools to limit what data others can collect about you. That includes us: Mozilla does not collect data from your use of the Facebook Container extension. We only know the number of times the extension is installed or removed.
When you install the Facebook Container Extension, it will delete your Facebook cookies and log you out of Facebook. The next time you visit Facebook, it will open in a new blue-colored browser (the “container tab). In that tab, you can login and use Facebook as you normally would. If you click on a non-Facebook link, it will load outside of the container.
I think this is a useful tool for people who value their privacy but do not want to stop using Facebook. It can be difficult to quit using Facebook if it is the most reliable way to contact members of your family.
It should be noted that the Facebook Container Extension is for Firefox. It won’t work on other browsers. The Mozilla blog points out that if you click on any Facebook Share buttons or other browser tabs it will load within the Facebook container. When you use those buttons, information will be sent to Facebook about the website that you shared from.