This add-on is pretty great but there are time when it completely removes all my data and I have to basically re-start and re-setup all my containers and say which sites open up where for no reason.
Just happened tonight where my three pinned tabs were all of sudden closed (about 20 seconds after just freshly opening the browser) and my custom containers don't exist anymore.
Could be my own issue where I use Firefox Nightly during the day and sync with Firefox Beta in the evenings so the sync-ing process messes things up but I don't know.
Makes me sad.

Love this extension. I hope they keep adding to it.
For example, I have both work Gmail and personal Gmail accounts. Would be awesome to understand how to make sure it goes to its right container. But, just started using it (for a week so far) so maybe its a noob limitation on my part. Still, love it.

Buen complemento, aunque parece que una vez que se asocia un "contenedor" a una pagina no hay manera de quitarlo. (Porque no puedo abrir la misma pagina en diferentes contenedores o porque me pide siempre, que lo habrá con el mismo!)

utilissimo e molto ben fatto

would be nicer if you had 2 more options:

1) option to enable/disable "Sort Tabs by Container" within settings with a checkbox or move it somewhere else, where you can't click it by accident. It's more than annoying if around 600 tabs get rearranged when you had them in a specific order …

2) an option to force the current container to inherit and thus override the settings for target tabs during this session only. Use case: online shops have their own container, banks have their own container, thus you can't really pay in an online shop as it switches to bank container and thus loses all important cookies and payment information. Add a tick next to url bar for override during this session and bank and all subsequent redirects would thus get the online shop container but ONLY during this session.

It's nice that Mozilla provides functionality to separate various sites' tracking garbage from each other so big companies can't really provide as complete of a fingerprint on you. Or if you're not schizophrenic like me, being able to use multiple accounts on the same browser is nice.

Needs more icon choices. Please add the following:
- "Newspaper" icon for news sites, articles, forums.
- "Health/Hospital" icon for online doctor/patient portals, pharmacy, etc.
- "School/College" icon for online courses, student portals, education, etc.
- "Game controller" icon for browser games, steam, twitch.
- "TV" icon for streaming services.
- "Mail" icon for email services.

Might also want to consider allowing emojis.

Containers are great, and I think they're off to a good start.

Great for working with multiple accounts, especially in a Public Cloud context. You can build up contexts relevant to the work you are doing, rather than always having to use an incognito session and start from scratch.

The idea of multi-account containers is great and the context separation between containers works, so far, reliably.

However, two side issues turn out so cumbersome that the gain of clearity and ease this add-on could potentially enable is hardly effective in practice:

(1) If you deal with many dozen open tabs, you may frequently enploy the % shorthand in address bar to quickly find a particular tab. Alas, that shorthand doesn't work across containers, so it gets close to useless unless the searched-for tab resides in the same container with the current tab. In order to search for any other open tab, you (1a) first need to remember its context container, then (1b) find an arbitrary tab belonging to that container, then (1c) perform the tab search there.

(2) Even with the "sort tabs by container" menu item (which has to be invoked manually each time), the visual overview provided by the thin colour marks at tabs is limited. The UI would be much clearer if containers were, or optionally could be, assigned to browser windows, making all tabs in that container appear in the associated window and nowhere else.

This (2) would also help a lot in dealing with (1), as finding a tab belonging to a particular container (1b) would be as easy as finding the corresponding browser window. Given that you typically use much fewer browser windows than tabs, even (1a) is not a big deal anymore as you can perform the tab search once in every browser window (i. e. container).

Should be a default feature in the developer edition. Thanks for the great work!

A fantastic add-on that opened the door for many other privacy enhancing add-ons.