I've been a long time Firefox user and have been making use of it both at home and at work. With Multi-Account Containers Firefox allows me to maintain a separation between my personal tabs and my work tabs. It's also very handy for browsing web sites that are sensitive such as logging into bank accounts. This add-on is one that is very useful for those who have a dual purpose use for Firefox. I highly recommend this plug-in. **Update**: Mozilla has been frequently updating this add-on and it's just gotten better and better. Thank you for a perfect add-on Mozilla, you are awesome and I love Firefox and this add-on.