@Antanicus Unfortunately, not on the instances I'm active on, as you can see.
@gcupc how are you using it? I used it when Firefox had tab groups but now that they got rid of it, I don't have a good use case for them.
@PresGas Pinned tabs? They just take up less space and are harder to accidentally closed.
Tab groups are coming back (as an API available to extensions) in Firefox 60, which is now in Nightly.
@gcupc I have been waiting for something closer to the old tab groups. This seemed the top candidate, but it keeps moving the compatibility to the dev version, so not fully baked.
@PresGas I use the new version of tree-style tabs, but it's not fully baked until the tab-hiding APIs land.
@gcupc and that's why instance favicons are a thing