01/27/2019: Annnnnd STILL waiting to just be able to reorder my groups in the groups menu. Astonishing that this is still not a thing.
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
08/20/2018: I have downgraded my review to one star, not because this extension is THAT bad but because of lack of attention to the add-on–especially as one of Mozilla's own add-ons. It is now almost September of 2018. Quantum has been out for how long now? And we STILL cannot do the simplest things like SORT GROUPS. Groups are forever doomed to stay where they are in your groups list when you add them. My groups are in such a FRUSTRATING, illogical order because I cannot move them around or sort them. Zero of the issues below have been touched either. Come on, Mozilla. Don't die on us again. If you're going to take away a bunch of developer functionality, replace it already on the new platform.

To add to the list:
- Please change add-on so that when a tab is assigned to a group that is hidden, the entire group does not unhide and load every single tab in that group. Need the option to keep the tab hidden.
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
ORIGINAL REVIEW:
This add-on has been a so-so substitute for TabGroups, but certainly not a replacement. Many months later and we still do not have simple things such as:
- tab hiding,
- a way to sort groups in the group-selection menu,
- a way to move an open tab not assigned a group to a group,
- a way to move a tab from one group to another,
- and very few group colors and icons for groups to choose from for differentiation.

Will we see a useful update to this add-on soon? It has potential but is very inefficient in its current state.