отлично работает

An essential add-on for using the container tabs.

I suggest to the author to mention that you can change the hotkey in the Extensions settings (Settings -> Extensions & Themes -> gear icon above the list of extensions -> Manage Extension Shortcuts).

Then to other users I suggest using AutoHotkey (on Linux there is Keysharp or AHK_X11) and reassigning the extension hotkey to Ctrl+T in Firefox. That way you don't need to retrain your muscle memory.

Note: you should probably change the hotkey from Alt+C since that hotkey is used for the Match Case option in the search dialog and will consequently interfere with trying to open a new tab when the search is also open.

Does one thing, and does it well. Question: is it possible to replace the normal shortcut ctrl+T to use this one instead of alt+C?

No permissions :))
Saves thousand of clicks and headaches.

Mac complainers about shortcuts- get a real computer, or CHANGE the shortcut in FF "manage extension shortcuts" (Gear icon, top right of addons page) and give this addon the 5 stars it deserves!

Amazing app works great on mac. Use Option+C for it to work. I would recommend adding an addition to allow customization of the key stroke.

Works as expected to. This is great. (I am on Arch)

Works perfectly for me! Wish I could replace the default Command+T though

Excelente extennsión, si la combinan con BTT no van a tener ningún problema es decir, si es Alt+C con BTT pueden programar un atajo para que CMD+T sea una nueva pestaña por defecto dependiendo del contenedor en el que estas.Great Add-on

This is exactly what I needed, but since I'm on Mac... it would be great to be able to change the shortcut, since Alt+C is not natural for us! (at least for me :-P)

A great companion for addons like Sea Containers. This makes it much easier to organize groups of tabs in dedicated containers.