Tab Group Keybindings от gautetr

Adds the following keybindings:

• Create new descendant tab. Works with Smart Tab Groups.
• Create new descendant tab, and create a new tab group if none exists.
• Break active tab out of current tab group.
• Toggle collapsed state of active tab group.

See "Manage Extension Shortcuts" under the cogwheel menu in about:addons for default key bindings, or to configure them to your liking.