At the setting of manage containers, after renaming the name and changing the color and icon, there is no Confirm(OK) Button.
How to confirm the change？

I have re-arranged the order of the containers. I can see the arrangement of the containers is updated successfully when I click the extension button to preview.

But if I the right-click the tabs, the order of the containers is still remaining the old sequence which has not been updated.

There are only 8 colors. So, I hope there are 50 types of different color.

Because most icons are not my favorite. I can only choose the circle to use. So, I hope there are 50 types of icons for users to choose.

What's the point of having containers if I cannot group tabs and show them only when one container is selected?

This add-on should be good but is knee capped but extremely poor support. The lack of options to manually add sites to the "Always Open In" listing can make it impossible to log into some sites. It NEEDS to have this feature along with wildcard support in the listing.This issue has been known about for over 5 years but is still outstanding.

Would not recommend this plugin to any one

It automatically puts links from Discord into a container which completely defeats my purpose for using the extension. I use a separate account for listening to music on YouTube and the only thing I want to open on that account is music videos because I want the algorithm to only recommend music. This extension automatically opens every YouTube link in that container. It seems to always prioritize the exact container I don't want the link to open in. It almost seems malicious.

Still no manual adding of URL's !
Workaround here:
https://github.com/mozilla/multi-account-containers/pull/2114#issuecomment-1004056712

Has anyone else noticed this add-on now breaks YouTube since YouTube started looking for ad-blockers? I turned off uBlock Origin figuring that would fix things, but nope. If I have youtube.com containerized using MAC, the site still complains thinking I am blocking ads as well.

I don't wanna have any popups about Mozilla VPN

无用

If I remove a page to open in certain container, after syncing it will come back and page will still open in that container. But I deleted page from the container.

No way to see tabs in a single container. It helps to keep multiple accounts, but without being able to segregate it's even more difficult to handle tabs.

Не работает.

Yet another icon taking up space so I have to reorient simply to enter a url in the urlbar. Just keep icons with the other icons in the toolbar NOT the urlbar.

Unable to uninstall

Spent hours setting my work containers up. I go back to my personal PC and sync. It doesn't sync. Go back to work and see everything is messed up.

Wenn ich einen neuen Container öffne sind alle Cookies, auch die aus anderen geöffneten Containern enthalten. Ich habe das jetzt mehrfach geteset. Somit ist diese Erweiterung für mich unbrauchbar.

This used to be one of my favorite add-ons for work in order to run separate instances of one program simultaneously.

Now it's become almost unusable because every time I open a link related to my work, I get that annoying pop-up message "Open this site in your assigned container?" and there is NO WAY to get it to stop. Even if I checkbox "Remember my decision" it will continue to pop up, regardless of if I click yes or no. When I attempt to manage the Container settings to remove or add the site, it's no help at all - it's completely blank and there's nothing I can do.

I wanted to report it to GitHub but it appears this was actually intended as a FEATURE and not a bug. Well, it's a really annoying feature and I wish I could turn it off.

Edit: I would appreciate if the reviewer above me would not imply that I had "done something wrong". The pop-up windows were unprompted and occurred whether or not I had Containers synced to my account, and I had troubleshooted various methods of resolution.

I want to open a web page in different containers but by default I want it to never ask me.
i have the same opinion of James Tuttle,
This extension is awesome, except for the fact that EVERY time you click on a link, open a new tab or type in a website url an error pops up asking "Open this site in your assigned Container?". You are then required to click ok if you want your page to load. The Firefox forum shows several people asking for a solution, with Firefox devs stating there is no solution because "Interrupting the user every time they open a new tab is how the containers plugin is supposed to work." As far as I can see, no one has been able to find a work around yet to make it so that when you right click and "open in new tab", Firefox is actually able to figure out how to open your link in a new tab without popping up that extra prompt.