Love this add-on. It's been great with my work to keep certain sites separated from each other. I use multiple Office 365 accounts a lot for example and using these helps with the admin login persistence issues. Also helps isolate junk sites that could be intrusive.

Excellent.
Though at the early time it might be confusing for new users.

解决了我的大问题,希望可以提供快速添加的功能,我需求比较多,一次能添加一百个就好了

Great add-on; please consider adding the ability to sort the containers based on various criteria like name and date created.