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Re:Container Tabs by icebraining on Saturday January 21, 2017 @12:26PM (#13451050)
Chrome has had it for a years, and it's a killer feature for many developers. It's very very useful to have multiple browser windows open, each logged into the same site as a different user. A lot of people do this by opening multiple browsers (FF, Chrome, Edge, Safari, etc) but that has its limits and it just adds another variable my poor brain would prefer not to handle.

Firefox has had this since, well, forever; they're called "profiles". I run two windows with different profiles (for "personal" and "work"), each with different install addons, Sync accounts, etc. Unfortunately the UI is clunky (requires adding a couple of flags to the shortcut/command).

Re:Container Tabs by StevePerkins on Saturday January 21, 2017 @01:23PM (#13451319)
Firefox profiles used to be more prominent/accessible. Then about 5 or so years back, Mozilla decided to dumb down the UI to better imitate Chrome. Now I think you have to actually launch Firefox from the command-line with special arguments to use profiles (or else install a third-party plugin to manage them).
Re:Container Tabs by Sylos on Saturday January 21, 2017 @02:13PM (#13451552)
You can also type "about:profiles" into the URL-bar, but yeah, that's a rather recent addition.
Re:Container Tabs by weaksauce on Saturday January 21, 2017 @05:38PM (#13452489)
You can have the profile manager pop up every time you open Firefox. It should probably have a better, more accessible UI though.
Re:Container Tabs by Certhas on Saturday January 21, 2017 @03:34PM (#13451968)
Indeed, I have several firefox profiles and corresponding launch scripts:

ff-home contains:

firefox -P home

etc...

Each of them has a different theme so the windows are clearly visually different.