This is add-on is not only amazing, it is essential.
I use it for two reasons:
1. The massive privacy boost.
2. The ability to separate my work and private life. I also use containers for finance and shopping.
Before this add-on I would have to either use a second browser and log-in to different accounts in private mode.
I love this add-on.

the main reason why I prefer Firefox to any other browser

This is very useful. Thanks for building it.

Работает прекрасно!

sangat bermanfaat untuk buka banyak akun.

Love it use it all the time.

This add-on is the main reason why I stick to Firefox. It is an absolute game changer when I need to use multiple accounts on the same website at the same time (e.g. have Gmail and YouTube in different accounts on different tabs).

Thank you.

Great add-on, love it. Although it is missing a crucial feature, the ability to add wildcard domains.