This is exactly what I was looking for! Even though this addon hasn't been updated in a while, it still works like a charm. The one thing I love about it is the ability to close the tabs directly from the window, which other addons fail to do. Great job! My two cents:

-Would be nice to have this utilize the entirety of my screen instead of the small box it shows all the tabs in
-Have the option to group the tabs by window instead of by domain

Good for overview of tabs en nice settings toggle!

Exactly what I missed to keep the control over many tabs. Works perfect till now.