What is missing in todays browsers is handling multiple profiles/sessions per browser window. I'd like to open my three gmail accounts in three separate tabs without them knowing about each other. That would simplify a lot of scenarios.
https://vivaldi.com/ (they push a few new things, it's closed source.. and rather taxing on performance)
http://otter-browser.org/ (this is more or less a hobby project I'd say)
... you are not already logged in?
... is that what you are saying?
Sure it's simplified but hardly convenient!
i.e. open that resource in one click.
I think those "tree tabs" extension would be great to separate these groups even visually. So each root node is a separate session for example.
It is one of the few things IE gets better (and has for a long time) than Chrome or Firefox where a single OS-level user can have at most two distinct sessions at any given time: one private and one not. It can be very handy from a development PoV when testing multi-user workflows in your application.
One caveat: if the site/application uses saved cookies rather then those set to expire at the end of the current session they will still interfere with each other when opened this way as saved cookies (those with an explicit expiry date/time) are considered global (with respect to the OS user) rather than local to the browser session.
I've not checked if this feature has carried into Edge. The clients I support are so backward that I'll not need to test against that this decade!
Chrome has support for profiles and having multiple open at the same time http://imgur.com/GU33K43
Best of all, they're persistent, making them ideal to have distinct 'home' and 'work' profiles in Chrome.
Chrome already supports multiple 'users' which fits nicely with what you describe.