It's great. Extremely useful.

However there have been no commits for over a year, so it looks like this is now abandonware until someone picks up the mantle and branches the project.

I would love to be able to drag tab groups between windows. Currently I have to keep both (or several) windows open to preserve the tab groups within.

I like keyboard only operation.
What should I do after pressing Ctrl+Shift+F?

La mejor para organizar nuestras pestañas <3 , espero que algún día vuelva a funcionar con Firefox Aurora, ya que desde la versión 67 no está funcionando :( // The best of tab grouping plugins, I love it so much because I am a widow of Tab Groups! Sadly, this doesn't work in Firefox Aurora 67, I hope they can fix it soon (I f*** love and need this addon!!)

The most compelling reason to use Firefox over Chrome.

I've been searching for an extension like this on Chrome for a long time. I used to use a feature called "Quicktabs" on a very old version of internet explorer. I'm glad that I finally found the extension for Firefox!

One of the best Firefox addons!

Could you add ability to display tab groups from other synced devices?

The add-on has been very useful for me, I would like it to be able to hide fixed tabs and I have presented problems with a tab that has a reproduction notification and this tab is not hidden.

Almost as good a Tab Groups. This is bringing back so much functionality that was lost in the leap to Firefox Quantum.