1. Please consider making it possible to re-order Tab Groups alphabetically.
Currently, names are added to the top of the list when first created, but as each Tab is accessed, and new tabs groups are added over time, the list becomes a complete jumble; making it hard to locate a specific group.
2. Better yet, why not make Tab Groups have their own tree structure — separate from the "List all tabs" button ...
3. (Not so important) Allow for selection of any web-permitted colour from a colour wheel or whatever, rather than just the current very limited range
Thank you so much for creating Tab Groups (they're so handy!), but I feel they can be improved still further. Over to you!