Single-group window

This extension makes windows that hold exactly one tab group behave as a dedicated window for that group. This will happen when a window contains one tab group and no ungrouped tabs: 1. New tabs join the group. Tabs you open from the omnibox, with Ctrl/Cmd+T, or from a bookmark are added to the group automatically, instead of landing outside it and cluttering the tab strip. 2. The window title carries the group name. This way, the window that holds a group is easily identifiable on Mission Control, the taskbar, or the window switcher. To turn it off, pull any tab out of the group. Put it back and group behavior resumes. The toolbar button toggles the title prefix on and off independently as well. No data is collected. No network requests are made. Nothing leaves your browser.