Works as expected.
Containers with spaces in their name work as well, for example
"ext+container:name=Name of the container&url=https://duckduckgo.com"

hello sir, can u help me why my extension not show in the toolbar? In setting it say already installed and turned on, i also already check the private network allow is on. but sill didnt show up in the toolbard, i also install firefox multi account container, this extension show but not yours. i even reinstall my os fully clean, but still not solving, pls sir can u help me?

When you have multiple accounts within the same domains, this add-on works well. My use case is that I have multiple AWS accounts and Azure tenants that I work with, each in their own container.

I got the format from another reviewer and it works well:
ext+container:name=EXACT-ALREADY-CREATED-CONTAINER-NAME-GOES-HERE&url=HTTPS://BOOKMARK-GOES-HERE

Very useful, because if you tell Firefox to always open a URL in a specific container it will open all URLs of that site (!) in that container, like all google.com products (Gmail, Drive, etc.). With this add-on, you can separate, for example, Gmail (in one container) from Drive (in a different container).

Only one flaw: no favicon support. Links changed to work with this add-on get a generic symbol by Firefox: a globe (like for sites without favicons).

This makes firefox containers so much more useful. Thank you Denys H

A great productivity enhancement if you use bookmarks and have to be logged in to the same Website under different identities. i.e. "Open Shop website as customer" and "Open shop website as shopkeeper".

This is the first time I can remember writing a review of an extension. I don't use many, but I use this one every day and it does exactly what I need it to. I mostly use it in batch scripts so that I can open up a set of webpages in the right containers at the start of my work day.

One note to help fellow Windows users: you may need to specify the full path to Firefox to get this to work. On my machine that's C:\"Program Files"\"Mozilla Firefox"\firefox.exe "ext+container:name="MyContainer"&"url=https://mozilla.org'

Also, as others have mentioned, if your container name has spaces in it, swap those for %20. Some other special characters will use similar syntax. You can use this site to convert the name properly: https://www.urlencoder.org/

Thanks for making this!

it Containers were already a "killer feature" of Firefox, this is like a weapon of mass destruction feature.

This extension means you can save a bookmark which opens gmail (or drive or calendar) in different containers for different accounts. Because the URL is the same for different gmail accounts, the standard feature of associating a URL with a dedicated container doesn't work: it's the same url for each gmail account, so they always open in the same container. This add-on solves the problem.

This is very convenient.

The notes are not very clear on how to do this.
Do it like so, taking gmail as the example.

Let's say you already have a Work and a Personal container.

First, use the Firefox container tool to remove any rules you have added which force gmail to open in a particular container. Such sites appear in a menu linked to the container name.


Add two bookmarks. You could go to gmail, and bookmark it, if you don't already have gmail bookmark

The normal URL is
https://mail.google.com/mail/u/0/#inbox

edit the bookmark to be

ext+container:name=Work&url=https://mail.google.com/mail/u/0/#inbox

then copy this bookmark to make a second one, and edit the bookmark to be
ext+container:name=Personal&url=https://mail.google.com/mail/u/0/#inbox

I've never posted a review before for a Firefox add-on, but this one is so elegantly implemented (and so sorely needed) that I felt compelled to do so.

This add-on is a simple solution to a vexing problem of how to force a bookmark to open in a specified container every time. Kudos to the developer!

If it's not entirely clear from the add-on description, once you've installed this add-on, you can replace any Firefox bookmark with the ext+container command syntax and that bookmark will always open in the specified container automatically. For example, if you have a bookmark to www.google.com that you want always to open in your Google container, first make sure you've created a container named Google, then right-click on your bookmark, select Properties, and change the location from https://www.google.com/ to ext+container:name=Google&url=https://www.google.com/

One note to other users: If your container's name has any spaces or other special characters in it, you have to urlencode the special character in the command (like replacing spaces with %20). For example, if you want your bookmark for www.bigbank.com to open in your My Banks container, the bookmark would be ext+container:name=My%20Banks&url=https://www.bigbank.com/

I would rate it 10 over 5. The add-on says what it does and does what it says. It may seem obvious but I'd like to suggest the developer to highlight that if a bookmark adheres to the "ext+container:name=MyContainer&url=" syntax it will open in "MyContainer" directly. That's a very good thing to have