It was about 6 years ago, when I got my current monitor. It was a good 4 inch upgrade from the previous one. Finally I am in the big leagues! And I didn't have to spend any money on viagra (sorry, stupid joke, I know).
Firefox used to have a really good extension, called Firefox Panorama. The aim was that the user could group tabs how they like, so they get a little bit better organized. However this extension ended some time ago, I don't know why. My guess is that Mozilla didn't want to confuse the average user. However the person never had to use Panorama, it was just there.
Many years later, Firefox Quantum is here, with a new line of extensions, and luckily people are fun of Panorama, did something really nice. It's called Simple Tab Groups.