Mozilla Connect

Need to make a feature: so that there is a setting that places a pinned tab in a group. For example, a freely movable group with a pinned tab (YouTube (pinned) tabs from YouTube, but not pinned)This will be convenient if the user uses pinned tabs as ...

SheldonBK, I think those that Mozilla marked as “recommended”  

If you are going to implement this function, then you need to be able to use vertical tabs on both sides