I realy love this extension, it's what I always searched for!
One feature that I'd love to see is the ability to map containers with firefox accounts.
By that I mean I have a personal firefox account with a set of bookmarks and a professional one.
Firefox containers kind of overlap with firefox accounts. On one hand I can access all my bookmarks and on the other one I can separate concerns easily.

Maybe I'm missing something but that would be awesome instead of going about:profiles everytime.

Wonderful tool for keeping your browsing efforts separated and fenced off from nosy Bots.

Seems like I had to do three things to make reopening in the right container "auto-magic";

Open a new tab in the "Amazon" container (long click on '+'). Past the URL into the new Amazon container tab.
Click the Multi-container symbol and select "Always open in Amazon"
Open a non-container tab and paste the URL, select "Remember my decision to always open in Amazon container"

After all 3 of these steps are done, the URL will always open in the selected container.

Once these 3 steps are done you're all set. However there are currently 2 things missing from this and other "container tools";

1. Easy Export/backup/restore/Import of container rules. It would be lovely if this capability were available in CSV and JSON formats. [Necessary for setup of multiple machines without Sync, and off-site storage of config(s)]

2. An easy way to Edit container rules beyond just delete and start over. This will allow quickly changing custom behavior(s). #1 might take this issue toward "feasible".

I put my own website (with multiple applications) in a container to keep nosy bots out of my site cookie jars.

Great idea, love having this feature. I'm tired of having everything I looked at on Amazon.com show up in my Facebook feed. This is a win for privacy and giving browser experience control back to the user. No other browser appears to have these tools, just Firefox.

Excellent idea, but i can't actually use it without analogue in mobile browser.

Almost perfect.

Tento doplněk mi přijde úžasný. Narozdíl od jiných doplňků, které mají zajistit soukromí a znemožnění stránkám vás sledovat je zde jasně vidět, co dělá. Bohužel je zde ještě spousta práce, kterou je potřeba udělat, aby si zasloužil 5 hvězdiček. Synchronizace mezi zařízeními je nutnost - nebudu trávit hodiny času učením prohlížeče, jakou stránku zavřít do jakého kontejneru opakovaně. Pak by bylo fajn mít nějaké UI na úpravu nastavení - např. mít možnost vypsat si stránky, které patří do jakého kontejneru by jistě ušetřilo práci proti současnému řešení, kdy člověk musí stránku otevřít v daném kontejneru, označit jako 'Vždy otevřít' a pak nejlépe znovu načíst, aby toto nastavení potvrdil.
Jen tak dál vývojáři!

Really nice add-on but I will put 5 stars if you add the "hide container eye" directly on each line of the container's list ; improvement for hiding with only 2 clic. Thank you.

Very nice but it is annoying to ask twice to remember the website assigned container by default. Why?

Great for privacy, great for multi-account access. Does what it says on the box.

To improve:
- Remove the "Open this site in your assigned container?" step, it's completely unnecessary. I've already said I want it, so do it.
- Allow (specific) extensions to work across containers, because I have to re-enter my LastPass password every time I open a new container, which is annoying.
- Ability to sync container config with Firefox account, for multi-device access.
- Ability to edit containers more efficiently, much like one would bookmarks. I'd like to be able to copy a folder of bookmarks and paste them into a container all at once.

Five stars if you save the containers and config for the site on firefox account and sync...

This is a really great extension that makes life much easier managing multiple clients.
What would be helpful in the future are adding key-bindings and synchronisation.
But again, great tool that I now use everyday. Thank you!

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

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

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.

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.

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.

Muito útil este add-on...

Seria perfeito se pudesse ser utilizado algumas ideias do add-on chamado "Temporary Containers", pois ele e meio difícil de entender .

Obrigado Moz & Dev's !!!