Pinned and grouped tabs stay put
Grouping only gathers loose tabs. A tab you pinned or grouped yourself is never moved, and a site needs two tabs before it becomes a group.
Tab playground
Below is a window like most people's. Group it, clear the duplicates, save it and close it - then bring it back. Every button follows the rules the extension uses.
Open tabs
This window is closed. Its tabs are safe in Saved windows.
What it will never do
Grouping only gathers loose tabs. A tab you pinned or grouped yourself is never moved, and a site needs two tabs before it becomes a group.
Two tabs count as duplicates only when the address matches exactly, and the tab you are on or a pinned tab is never the one closed.
A saved window keeps its groups, their names and colours, and restores as a window - not as a pile of tabs in the one you are using.
The tab manager Saving tab groups Rules that group tabs Companion playground
Latr asks to see your tabs the first time you open Open tabs - never at install. Free, no account, and nothing leaves your device.
Also on Brave, Vivaldi, Arc and Opera - straight from the Chrome Web Store listing.