It is obvious that having silos, or isolated brower sessions per tab is a good idea unless you are fine with being tracked about the web.
This solution for Firefox works well for me, as far as I can tell, and is relatively easy to use. It takes some time to setup and each website you visit belonging to an organization that you want to put into a specific container needs to be placed manually into that container (you can't seem to set a wildcard via the front-facing interface?).
But when done, you just surf and tabs open up naturally and all that you've asked to be isolated is: just as I'd want its functionality to behave.

It's very easy to keep my tabs separated by activity, and I love the feature of being able to login with different accounts in different containers! This is exactly what I needed.

Much more convenient than having multiple Chrome accounts. However, it could be improved. I can't reorder the accounts in the popup menu. There is also a bug where if I open an assigned website from the default new tab "top sites" section, two tabs open instead of one.

I tested this useful addon on Waterfox , but when i click on the icon i don't see the dropdown menu.
(i read somewhere it's by design but by design of what???)
Edit:
With the help of:
https://www.reddit.com/r/waterfox/comments/bkt2t2/multi_account_containers_borked/f0xriwz/ ,
I can see the menu...
Need time to test now!

Excellent Add-on,

I love what your doing with it, but it feels extremely incomplete. I love the product and will keep using it, but there is one thing in particular that really bugs me.

When I have tabs open that are not assigned to a particular container, I should be able to, from that open tab, assign them to their appropriate container.

I can't.

I have to open a new tab already assigned to that container, then travel to that website, and then I can assign that website to a container.

If all tabs are opened in "default" as if it is it's own container, then why can't I interact with "default" like any other container?

Why can't I assign "new tab" to a container?

Très bien mais un gros bug lorsqu'on installe l'extension avec Speed Dial.

Chaque vignette SpeedDial dont l'URL a été mise dans un container s'ouvre dans le container dès le chargement de la page SpeedDial. Comme une nouvelle fenêtre s'ouvre, il est impossible de revenir sur l'onglet qui contient les vignettes speedDial (sinon, aussitôt que l'on accède à cet onglet, une nouvelle fenêtre s'ouvre pour ouvrir le site dans un container alors que l'on n'a pas cliqué pour ouvrir le site).
Donc, si vous avez SpeedDial, il ne faut mettre aucun des liens des vignettes dans un container (en cochant "s'ouvre par défaut dans ce container"), donc très peu d'utilité d'avoir des container...

I used this extension a few days ago and it has been a great benefit for me to protect my information from facebook and it's related services. Which helps me now to securely use the internet without giving them unauthorized access to my interests and other private data. Huge thanks to you guys at Mozilla for making this happen.

Really gives me the warm and fuzzies! Seems to be having an effect, too.

A must for every firefox browser

Normally I don't log-in to post comments or reviews since I fear tracking cookies and it's too inconvenient to open a private browsing window just to post my opinion. This add-on has changed everything.

It's been a real pain managing multiple accounts using a combination of private browsing and different browsers. There are very few features in any application that increase both convenience and security/privacy. This add-on is one of those features. Things like this are the reason I still prefer Firefox over other browsers.

I'm giving this add-on five stars even though I think Multi-Account containers is a rather dry name. Wouldn't Personas have sounded cooler?

This is a great start. A few small changes would make a big difference. If there was a way to set one container as the default where all new tabs (unless specified otherwise) went into that container, that would be great. Most of my tabs are work, so it would be nice to have that be the default one.

Also, I'd like it to automatically reset a tab to a certain container like it does to facebook, just by what site I went to. For example, I'd like that same functionality for facebook to apply to Twitter, Pinterest, and other social media. If there was a way to integrate sites that are saved as bookmarks with containers, that might be a great way to do it.

Keep up the good work on privacy. You're the only group that seems to be doing it.

Very much follows the spirit of "Tab Groups" from the old FireFox.

However, a list of critiques:

- Support for FireFox Sync is almost mandatory for next update priority. The lack of being able to sync my container definitions between all my PCs is going to be deal-breaking if it's not addressed.
- Tab Right-Click assignment of container group.
- Wider range of colors and icons would be nice.
- A better customization experience for power users to control how sites and tabs are categorized, and the edit process for container definitions.

You're on the right track. Please listen to the feedback!

This should be included in the browser, but I understand if they want to keep it an addon. This is perfect for developers who want to test with multiple simultaneous logons. It's perfect for anyone trying to keep their various online lives separate (e.g. work vs personal). And it's perfect for trying to get out of filter bubbles.

Great addon. One thing I would like to see is the option to only open new tabs in containers for sites that have them assigned. If I open a link from a Google search, I don't want it to remain in my container for Google, even if that means forcing them to always opening a new tab.

Very good add-on. Two extra functionalities would be helpful. First, the ability to sort the containers alphabetically or just rearranging them. Second, synchronisation across different computers.

if only containers supported enabling disabling extensions per container

This feature is really amazing. This is something what was missing all the time. I mean I am really enjoying in a little bit more privacy about who is looking into my cookies. Thanks for developing this amazing addon. Keep it up!