This is by far the most useful extension for any browser and is the primary reason I use Firefox over Chrome, Safari, etc. It is particularly useful when trying to deal with multiple Google accounts where you might want to access Google Docs from multiple Google accounts simultaneously. Thank you from the bottom of my heart to the developers and maintainers of this extension!

Amazing add-on. One of the main reasons I'm here using Firefox instead of Chromium-based-browsers. Hope it never gets unmaintained.

It's a great addon but please add a way to manually add URLs to open in a container, sometimes websites do quick redirections between domains (see Google) and it's impossible to add the redirecting domain to the container! Also wildcard support for manually added domains would be great (eg: *.google.com). Thanks!

I love it! Only thing is: it does not seem to work if a webshop is using Adyen as a payment method. At least with the 'shop' from dpd.nl dpd.de which uses Adyen.