On the one hand, I very much like the idea, and often this add-on works great. On the other hand, I have a need to open tabs for https://domain.org AND https://subdomain.domain.org and there is no way to get both of these opened into the same container. The emails they send me link to subdomain.domain.org - and I'm not logged in there, because they are in a separate container.

This doesn't seem to work for Facebook

This addon is incredibly useful when it works right, but I've recently started running into lots of bugs that make it frustrating to use (such as tabs being randomly removed from containers, or old tabs constantly popping back up even after I've closed them).

Serious usability issues. It does not reliably open the website in the proper container, even when you check "Always open in Personal" option. The reason is because there is no way to manually specify which URLs go with which container. Instead, you have to check the box after the page fully loads to tell it to always open in the current container. You cannot always tell the current page to open in a *different* container. You cannot manually write a whitelist of which URLs go to which container.

The reason this is problematic, is because oftentimes, you will get redirected from one page to another after logging in. You'll open your Social Media tab, go to the site, log in, then check "Always open in Social Media". But then the next time you navigate to the site via URL or bookmark, it will open in the standard container because the rule was made for the signed-in redirected URL, not the original URL. You can't open the original URL in the Social Media container because you get redirected immediately to the redirected URL. And you can't open the original URL in the standard container and request to "Always open in Social Media". So, you have to open your Social Media container, log out, make sure the log-in page is set to "Always open in Social Media", then log back in. What a pain!

Does the job but as the description says, unlike FB container, doesn't prevent you from opening links in the wrong container and this kind of defeats its purpose. Additionally, after I carefully created a number of containers, it mysteriously forgot all of them and reset itself to its initial state. Not cool.

Ok in the desktop browser but pointless when the iOS does not support extensions, so will go back to using separate browsers to separate out my work and personal profiles.

This extension worked fine for me before. But since one year my different conainters don't remember my 2 gmail accounts, so i'm forced to relog each time. Reinstall of firefox doens't solve the matter.
If someone has any other advice or other extention to recommend, i'm all ears.

This add-on is basically the only reason I use Firefox, and it has so many issues that I frequently contemplate leaving it.

Syncing across multiple devices (Windows, Mac, Linux) just doesn't work. It doesn't. On Windows I have 4 duplicate "Home" containers that reappear every time I sync. On Linux I get over 10,000 "Personal" containers. On Mac, who knows. I delete the extra containers (or try, on Linux), and next time I sync a device, they're back! It's maddening!

Now on Linux I've uninstalled and reinstalled a dozen times, and it won't add my custom groups. Where did they go? Why is this so hard?

Resets all containers after being disabled

I wanted to have gmail (my work account) in one container, and gmail( my private account) in another. The whole thing breaks which makes the extension pretty much worthless.

Great concept but not useable for me. For example I use DuckDuckGo "bangs" a lot. For visiting Twitter I type !tw in to DuckDuckGo. I want to automatically switch containers when I visit Twitter however with a redirect (like with duckduckgo bangs) I have an "empty" tab in the default container and a new one with twitter which is pretty annoying. I hope this get's improved in the future.

This extension interrupted me with a stupid pop-up begging me to come here and write a review, so here's your two-star review. It would be five stars if you didn't show me inane pop-ups.

呃…找不到此网站。

我们无法连接至 xn--addons-2x8i375agjh1tz.mozilla.org 的服务器。

如果确定此网址正确，您可以尝试：

过会儿再重试。
检查您的网络连接是否正常。
如果您部署有网络防火墙，请检查 Firefox 是否已被授权访问网络。

The idea is great, it worked great. It took me weeks to finetune everything and really think about what I would like to open in which container. Had a few problems with webshops opening in one container and the bank to pay in a different one. Also quite a few 'prove that you are who you say you are by clicking the link in your email' type of situations, which were opened in the wrong tabs. Everything in the end worked great! But then I had a problem with firefox and decided to refresh firefox. Normally not a problem, due to sync I have all my settings back within a few minutes. But every site was opening without containers. I waited and waited and waited and waited... Yeah, no link to sync. Bye bye weeks of work to get 12 containers work brilliantly.

Since one of the most important functions is completely missing... only 2* otherwise 5*

Not really useful without the ability to sync and to move or copy cookies and site data when reassigning a site to another container

Great idea, lazy execution.
Often fails to contain certain sites in their containers, popup for confirming a site be exclusively handled in given container sometimes unusable. Containers are a single flat list.
All that is minor, for an official addon it cannot sync settings, and settings are partially lost when disabled. Sites contained in default containers will be remembered, custom containers permanently lost.
If you are going to delete everything on disable (not remove), for any reason, at-least be thorough.

TLDR: Bare minimum functionality, still buggy. Is being an example an excuse for being poorly done?

Great idea. Too many bugs.

Works great until all of the container configuration disappears and it for some reason reverts to the original four default containers it comes with upon installation. I hope it gets better. It is pretty frustrating to recreate ~10 containers and assign dozens of web sites to each of them more than once.

Simple and useful application, but... It deleted all of my containers when I disabled it for short time.. so it should be? Then how to restore containers?

Great idea in principle, but after having lost all my custom containers yet again after an update, it seems like far more trouble than it is worth.

As this extension stands, it doesn't offer enough options to be truly powerful. You can't make websites truly exclusive to their containers (at least I haven't found that option) and you can't have containers that wipe out their data after you stop using them (essentially mini private tabs) and the developers don't seem to be interested in such features.

It's OK but nothing special. Too simplistic to be really useful in actuality.

This extension (which I've become dependent on) has stopped working recently. Now I'm given a choice to open a site in a given container, but the button doesn't do anything.