Questionable decisions:
1. removing groups will close tabs (!?!)
2. once I opened a group, I could not find a way to return to the non-grouped tabs.
Also, you cannot have multiple groups opened in the same browser window.

ok

Keeps saving files onto my computer, and is pretty inconvenient to use.

Використовую перший день ) Дуже зручно, потрібне доповнення. Відразу кинулось в очі - не вистачає можливості завжди відображати деякі вкладки, яка б група не була вибрана (як варіант - можливість вказувати на групі "показувати вкладки завжди" або додавати вкладки у кілька груп одночасно).Також був би зручним пункт "додати групу в закладки" з додаванням всіх вкладок групи в закладки з збереженням групування

It worked the first day, and it hid all the tabs I chose that day for a while, but then yesterday the extension broke and I couldn't open the extension's menu, the extension UI didn't show up when I right-clicked on a tab, and then all my hidden tabs just popped up again at one point. I kept getting some error message and I didn't know how to fix it, so I uninstalled the extension and reinstalled it to see if that would fix it, it didn't.

Useless to me, as you cannot have multiple tab groups open at the same time. I was just looking for a way to group my tabs together, but it hides all except for the active group. Just not what I was looking for I suppose.

My tab strip still looks clotted, but at least I can find them using this add-on.

Sometimes clicking on groups does something stupid by moving the active group to the clicked group. There is an error :(