21-07-2026 03:34 AM
I'm excited to announce that as of Firefox version 153, Containers are now built into the browser. More information can be found in this blog post.
In this preview release, you can:Open tabs in specifications containers:
21-07-2026 12:54 PM - edited 21-07-2026 12:54 PM
For my workflow, it would be ideal if a window could be configured with a default container, such that opening a new tab here using a keyboard shortcut would have this configured container assigned.
I know that browser profiles is a way I can get that behavior, but that has its own issues.
21-07-2026 12:59 PM
I'd like to know how it relates to the cookie isolation feature that we have now. I mean the "isolate cross-site cookies" setting. Will it work together, or will the isolation become obsolete?
21-07-2026 01:29 PM
Long time user of Multi account containers here. This is a killer Firefox feature for me as a developer. Testing IAM flows, doing demos where I'm playing multiple users interacting, keeping different sessions open so I can juggle my multiple codex subs, all valuable use cases. I find trying to do the equivalent on Chrome enormously frustrating.
Colleagues have to do demos with one edge window, one chrome window, one incognito window - agony!
21-07-2026 01:42 PM
I think profiles, the already-existing feature would allow that, for you and your colleagues, both in Firefox and in Chrome.
21-07-2026 01:44 PM
Yeah if I wanted to have to deal with lots of windows. Having per tab containers is super nice, more than one browser window per screen and I'm instantly lost trying to remember which window has which tab.
21-07-2026 02:38 PM
You'll get equally lost with containers then.