This is the Addon I've been looking for.
For Literally Years. Ever since this was removed from the main FF. I'm extremely glad to see it's back again!
Wonderful job you've done with it. I only regret that I cannot give it 6 stars.

This is exactly what I've been looking for, can manage tabs in visual groups and resize them as needed.

Can also drag and drop a tab from one group into the white space and it automatically creates a new tab group.

Thank you for developing this!

Thank you for bringing back the old good feature. I love it. Good for organizing too many tab.

Thank you for making this great add-on! It's easy to use and has improved my efficiency. It's nice to be able to visualize all my tabs at once and organize them into groups.

Must have addon! Latest update got a huge performance-boost, now it opens instantly - truly surpassed the original functionality from firefox by a good bit! :)

Обновление 0.8.9 стало работать очень быстро! Спасибо!

I have around 300 tabs opened and this add-on is trully a god sent for me!

paired this with a tab discard add-on, I can go even more tabs.

oh and, that Dark theme is really sexy!

I was a little bit afraid when I tried to remove the extension while some of my tabs are in their own groups, I thought they will be gone but they are not. they simply back to a full tabs strip.

so to those who have a bad habit like me, opening too many tabs, this add-on is definitely a must have for you.

Thank you!

Perfect replacement for Firefox's group tabs feature they had back in version 45.