It needs sync to be able to be the same containers across all my Firefox installations on all platforms.

Really Great. It would be nice to add possibility to copy move tabs between containers.

It doesn't sync. I would like to share the same container types between my computers. I have a Mac and a PC.

El concepto de los contenedores, cuando lo entiendes, tiene mucha utilidad.

Great extension. What keeps me from giving 5 stars is that the keyboard shortcuts need to be mappable. It should be one command to open a container tab.

It is a great ideea to bring this feature using this add-on to Firefox, thank you!

Very useful indeed! But I did notice a little problem. When I was in my Personal tab and span a child tab (also personal) to a Medium post as anonymous, one of my cpu cores goes up to 100% load.
That happen every time I spanned the Personal tab with this Medium post.
But, when I opened up the exactly same site on a regular tab (also as anonymous), the cpu was just fine.
So, I logged in at Medium in the Personal context, and the behavior was gone.
That happens on a Firefox Quantum in a Linux Fedora distribution.

A good add-on for keeping some activities separate from each other. The only bad thing that I can say about it is that the icon looks great in default and light mode, but when I switch to dark mode, I can barely see the icon. Still a good add-on, does what it says on the tin.

This functionality is welcome. What was previously managed with multiple browser accounts can now be managed with only one (provided I use the same add-ons).
A few things that would make its initial and possibly regular use more convenient in my case, mainly different ways to sort websites into a container and make it defualt.
--ability to import bookmarks and bookmark folders so that they defualt to a specific container.
--ablity to sort "current tab" and "all open tabs" into a specific container when clicking on the add-on icon
--had minor issues with [are you sure you want to open this site in this container by defualt] message where it was sometimes unresponsive (I added an entire bookmark folder to a container and opened all at once) I mostly had to wait and reload before confirming.
--The ability to generally avoid/disable the [do you want this to defualt to this container] without individually using the [rmember for this site] setting might be welcome.
Consideration: if I'm already in a particular container and link to a site that would normally use a different container I would most likely not want it to instead remain in the current container or have me decide, unless in the defualt container. If the [remember for this site] option is not selected the message does serve that purpose but it's not useful when opening bookmarks. So implementation may have to be complicated or have to allow for various rules that are dependent on the current container.