Is it me or is that link not working?

interestingly, I find tab groups less productive, more cluttering.

Hopefully it will come to esr and it's forks in a reasonable time

does it has shortcut keys to add current tab into group, or open tab inside of a specific group, etc? This would make it more useable and productive. I was thinking if its only clicking, its not so intuitive because there are socmany things to navigate through

I never understood the appeal of tab groups but that's just me.
I prefer workspaces which organize your tabs in its own window. Since workspaces are not fully implemented in FF yet, the simple tab groups plugin is great.